STMicroelectronics STM32WB15CC Datasheet

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Multiprotocol wireless 32-bit MCU Arm®-based Cortex®-M4

UFQFPN48

7 x 7 mm

solder pad

Features

 Includes ST state-of-the-art patented

technology

 Radio

– 2.4 GHz – RF transceiver supporting Bluetooth

specification

– RX sensitivity: -95.5 dBm (Bluetooth

Energy at 1 Mbps)

– Programmable output power up to +5.5

dBm with 1 dB steps – Integrated balun to reduce BOM – Support for 2 Mbps – Dedicated Arm

for real-time Radio layer – Accurate RSSI to enable power control – Suitable for systems requiring compliance

with radio frequency regulations ETSI EN

300 328, EN 300 440, FCC CFR47 Part 15

and ARIB STD-T66 – Support for external PA – Available integrated passive device (IPD)

companion chip for optimized matching

solution (MLPF-WB-01E3)

 Ultra-low-power platform

– 1.71 to 3.6 V power supply – – 40 °C to 85 / 105 °C temperature ranges – 12 nA shutdown mode – 610 nA Standby mode + RTC + 48 KB

RAM – Active-mode MCU: 33 µA / MHz when RF

and SMPS on – Radio: Rx 4.5 mA / Tx at 0 dBm 5.2 mA

32-bit Cortex® M0+ CPU

STM32WB15CC

with FPU, Bluetooth

5.2

Low

 Core: Arm

adaptive real-time accelerator (ART Accelerator) allowing 0-wait-state execution from Flash memory, frequency up to 64 MHz, MPU, 80 DMIPS and DSP instructions

 Performance benchmark

– 1.25 DMIPS/MHz (Drystone 2.1)

 Supply and reset management

– High efficiency embedded SMPS 

step-down converter with intelligent bypass mode

– Ultra-safe, low-power BOR (brownout

reset) with five selectable thresholds – Ultra-low-power POR/PDR – Programmable voltage detector (PVD) –V

 Clock sources

– 32 MHz crystal oscillator with integrated

trimming capacitors (Radio and CPU clock) – 32 kHz crystal oscillator for RTC (LSE) – Internal low-power 32 kHz RC (LSI1) – Internal low-drift 32 kHz RC (LSI2) – Internal multispeed 100 kHz to 48 MHz

oscillator, factory-trimmed – High speed internal 16 MHz factory

trimmed RC – 1x PLL for system clock and ADC

32-bit Cortex®-M4 CPU with FPU,

mode with RTC and backup registers

BAT

5.2 radio solution

Datasheet - production data

February 2021 DS13258 Rev 1 1/121

This is information on a product in full production.

www.st.com

STM32WB15CC

 Memories

– 320 KB Flash memory with sector

protection (PCROP) against R/W operations, enabling radio stack and application

– 48 KB SRAM, including 36 KB with

hardware parity check – 20x32-bit backup register – Boot loader supporting USART, SPI, I2C

interfaces – 1 Kbyte (128 double words) OTP

 Rich analog peripherals (down to 1.62 V)

– 12-bit ADC 2.5 Msps, 190 µA/Msps – 1x ultra-low-power comparator

 System peripherals

– Inter processor communication controller

(IPCC) for communication with Bluetooth

Low Energy – HW semaphores for resources sharing

between CPUs – 1x DMA controller (7x channels) supporting

ADC, SPI, I2C, USART, AES, timers – 1x USART (ISO 7816, IrDA, SPI Master,

Modbus and Smartcard mode) – 1x LPUART (low power) – 1x SPI 32 Mbit/s – 1x I2C (SMBus/PMBus) – Touch sensing controller, up to eight

sensors – 1x 16-bit, four channels advanced timer – 1x 32-bit, four channels timer – 2x 16-bit ultra-low-power timer – 1x independent Systick – 1x independent watchdog – 1x window watchdog

 Security and ID

– Secure firmware installation (SFI) for

Bluetooth

Low Energy SW stack

– 2x hardware encryption AES maximum

256-bit for the application and the Bluetooth

Low Energy – HW public key authority (PKA) – Cryptographic algorithms: RSA, 

Diffie-Helman, ECC over GF(p) – True random number generator (RNG) – Sector protection against R/W operation

(PCROP) – CRC calculation unit – Die information: 96-bit unique ID – IEEE 64-bit unique ID. Possibility to derive

Bluetooth

 Up to 37 fast I/Os, 35 of them 5 V-tolerant

Low Energy 48-bit EUI

 Development support

– Serial wire debug (SWD), JTAG for the

application processor – Application cross trigger

 All packages are ECOPACK2 compliant

2/121 DS13258 Rev 1

STM32WB15CC Contents

Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3 Functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.1 Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.2 Arm

3.3 Memories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.4 Security and safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Cortex®-M4 core with FPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.3.1 Adaptive real-time memory accelerator (ART Accelerator) . . . . . . . . . . 14

3.3.2 Memory protection unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3.3 Embedded Flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3.4 Embedded SRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.5 Boot modes and FW update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.6 RF subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.6.1 RF front-end block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.6.2 BLE general description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.6.3 RF pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.6.4 Typical RF application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.7 Power supply management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.7.1 Power supply distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.7.2 Power supply schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.7.3 Linear voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.7.4 Power supply supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.7.5 Low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.7.6 Reset mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

3.8 VBAT operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

3.9 Interconnect matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

3.10 Clocks and startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

3.11 General-purpose inputs/outputs (GPIOs) . . . . . . . . . . . . . . . . . . . . . . . . . 35

3.12 Direct memory access controller (DMA) . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3.13 Interrupts and events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3.13.1 Nested vectored interrupt controller (NVIC) . . . . . . . . . . . . . . . . . . . . . . 36

DS13258 Rev 1 3/121

Contents STM32WB15CC

3.13.2 Extended interrupts and events controller (EXTI) . . . . . . . . . . . . . . . . . 37

3.14 Analog to digital converter (ADC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3.14.1 Temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3.14.2 Internal voltage reference (VREFINT) . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.15 Comparator (COMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.16 Touch sensing controller (TSC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.17 True random number generator (RNG) . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.18 Timers and watchdogs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.18.1 Advanced-control timer (TIM1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.18.2 General-purpose timer (TIM2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

3.18.3 Low-power timer (LPTIM1 and LPTIM2) . . . . . . . . . . . . . . . . . . . . . . . . 40

3.18.4 Independent watchdog (IWDG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

3.18.5 System window watchdog (WWDG) . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

3.18.6 SysTick timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

3.19 Real-time clock (RTC) and backup registers . . . . . . . . . . . . . . . . . . . . . . 41

3.20 Inter-integrated circuit interface (I

C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

3.21 Universal synchronous/asynchronous receiver transmitter (USART) . . . 43

3.22 Low-power universal asynchronous receiver transmitter (LPUART) . . . . 43

3.23 Serial peripheral interface (SPI1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

3.24 Development support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

3.24.1 Serial wire JTAG debug port (SWJ-DP) . . . . . . . . . . . . . . . . . . . . . . . . . 44

4 Pinouts and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5 Memory mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

6.1 Parameter conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

6.1.1 Minimum and maximum values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

6.1.2 Typical values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

6.1.3 Typical curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

6.1.4 Loading capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

6.1.5 Pin input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

6.1.6 Power supply scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

6.1.7 Current consumption measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

6.2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

4/121 DS13258 Rev 1

STM32WB15CC Contents

6.3 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

6.3.1 Summary of main performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

6.3.2 General operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

6.3.3 RF BLE characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

6.3.4 Operating conditions at power-up / power-down . . . . . . . . . . . . . . . . . . 65

6.3.5 Embedded reset and power control block characteristics . . . . . . . . . . . 66

6.3.6 Embedded voltage reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

6.3.7 Supply current characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

6.3.8 Wakeup time from Low-power modes and voltage scaling

transition times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

6.3.9 External clock source characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

6.3.10 Internal clock source characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

6.3.11 PLL characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

6.3.12 Flash memory characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

6.3.13 EMC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

6.3.14 Electrical sensitivity characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

6.3.15 I/O current injection characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

6.3.16 I/O port characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

6.3.17 NRST pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

6.3.18 Analog switches booster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

6.3.19 Analog-to-Digital converter characteristics . . . . . . . . . . . . . . . . . . . . . 101

6.3.20 Comparator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

6.3.21 Temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

6.3.22 V

6.3.23 SMPS step-down converter characteristics . . . . . . . . . . . . . . . . . . . . . 108

6.3.24 Timer characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

6.3.25 Communication interfaces characteristics . . . . . . . . . . . . . . . . . . . . . . 109

monitoring characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

BAT

7 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

7.1 UFQFPN48 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114

7.2 Thermal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117

7.2.1 Reference document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

7.2.2 Selecting the product temperature range . . . . . . . . . . . . . . . . . . . . . . 117

8 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

DS13258 Rev 1 5/121

List of tables STM32WB15CC

List of tables

Table 1. STM32WB15CC device features and peripheral counts . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 2. Access status vs. readout protection level and execution modes . . . . . . . . . . . . . . . . . . . 15

Table 3. RF pin list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 4. Typical external components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 5. Power supply typical components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 6. Functionalities depending on system operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 7. STM32WB15CC modes overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 8. STM32WB15CC CPU1 peripherals interconnect matrix. . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 9. DMA implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 10. Temperature sensor calibration values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Table 11. Internal voltage reference calibration values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Table 12. Timer features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 13. I2C implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 14. Legend/abbreviations used in the pinout table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Table 15. STM32WB15CC pin definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Table 16. Alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Table 17. Voltage characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Table 18. Current characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Table 19. Thermal characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Table 20. Main performance at VDD = 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Table 21. General operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Table 22. RF transmitter BLE characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Table 23. RF transmitter BLE characteristics (1 Mbps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Table 24. RF transmitter BLE characteristics (2 Mbps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Table 25. RF receiver BLE characteristics (1 Mbps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Table 26. RF receiver BLE characteristics (2 Mbps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Table 27. RF BLE power consumption for VDD = 3.3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Table 28. Operating conditions at power-up / power-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Table 29. Embedded reset and power control block characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . 66

Table 30. Embedded internal voltage reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Table 31. Current consumption in Run and Low-power run modes, code with data processing

running from Flash memory, ART enable (Cache ON Prefetch OFF), VDD = 3.3 V . . . . . 69

Table 32. Current consumption in Run and Low-power run modes, code with data processing

running from SRAM1, VDD = 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Table 33. Typical current consumption in Run and Low-power run modes, with different codes

running from Flash memory, ART enable (Cache ON Prefetch OFF), VDD= 3.3 V . . . . . . 71

Table 34. Typical current consumption in Run and Low-power run modes,

with different codes running from SRAM1, VDD = 3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Table 35. Current consumption in Sleep and Low-power sleep modes, Flash memory ON . . . . . . . 73

Table 36. Current consumption in Low-power sleep modes, Flash memory in Power down . . . . . . . 73

Table 37. Current consumption in Stop 1 mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Table 38. Current consumption in Stop 0 mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Table 39. Current consumption in Standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Table 40. Current consumption in Shutdown mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Table 41. Current consumption in VBAT mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Table 42. Current under Reset condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Table 43. Peripheral current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Table 44. Low-power mode wakeup timings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

6/121 DS13258 Rev 1

STM32WB15CC List of tables

Table 45. Regulator modes transition times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Table 46. Wakeup time using LPUART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Table 47. HSE crystal requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Table 48. HSE clock source requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Table 49. HSE oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Table 50. Low-speed external user clock characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Table 51. Low-speed external user clock characteristics – Bypass mode . . . . . . . . . . . . . . . . . . . . . 86

Table 52. HSI16 oscillator characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Table 53. MSI oscillator characteristics

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Table 54. LSI1 oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Table 55. LSI2 oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Table 56. PLL characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Table 57. Flash memory characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Table 58. Flash memory endurance and data retention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Table 59. EMS characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 60. EMI characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Table 61. ESD absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Table 62. Electrical sensitivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Table 63. I/O current injection susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Table 64. I/O static characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Table 65. Output voltage characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Table 66. I/O AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Table 67. NRST pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Table 68. Analog switches booster characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Table 69. ADC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Table 70. Maximum ADC R

values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

AIN

Table 71. ADC accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Table 72. COMP characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Table 73. TS characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Table 74. V Table 75. V

monitoring characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

BAT

charging characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

BAT

Table 76. TIMx characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Table 77. IWDG min/max timeout period at 32 kHz (LSI1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Table 78. Minimum I2CCLK frequency in all I2C modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Table 79. I2C analog filter characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Table 80. SPI characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Table 81. JTAG characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Table 82. SWD characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Table 83. UFQFPN48 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Table 84. Package thermal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Table 85. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

DS13258 Rev 1 7/121

List of figures STM32WB15CC

List of figures

Figure 1. STM32WB15CC block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 2. STM32WB15CC RF front-end block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 3. External components for the RF part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 4. Power distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 5. Power-up/down sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 6. Power supply overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 7. Clock tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 8. STM32WB15CCU UFQFPN48 pinout Figure 9. STM32WB15CCU UFQFPN48E pinout

Figure 10. Pin loading conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 11. Pin input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 12. Power supply scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 13. Current consumption measurement scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Figure 14. VREFINT vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Figure 15. Typical application with a 32.768 kHz crystal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Figure 16. Low-speed external clock source AC timing diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Figure 17. HSI16 frequency vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Figure 18. Typical current consumption vs. MSI frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Figure 19. I/O input characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Figure 20. Recommended NRST pin protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Figure 21. ADC accuracy characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Figure 22. Typical connection diagram using the ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Figure 23. SPI timing diagram - Slave mode and CPHA = 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Figure 24. SPI timing diagram - Slave mode and CPHA = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Figure 25. SPI timing diagram - Master mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Figure 26. UFQFPN48 outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Figure 27. UFQFPN48 recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Figure 28. UFQFPN48 marking example (package top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

(1) (2)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

(1) (2)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8/121 DS13258 Rev 1

STM32WB15CC Introduction

1 Introduction

This document provides the ordering information and mechanical device characteristics of

the STM32WB15CC microcontroller, based on Arm

cores

(a)

. Throughout the whole

document TBD indicates a value to be defined.

This document must be read in conjunction with the reference manual (RM0473), available

from the STMicroelectronics website www.st.com.

For information on the Arm® Cortex®-M4 and Cortex®-M0+ cores, refer, respectively, to the

Cortex

-M4 Technical Reference Manual and to the Cortex®-M0+ Technical Reference

Manual, both available on the www.arm.com website.

For information on Bluetooth® refer to www.bluetooth.com.

a. Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

DS13258 Rev 1 9/121

Description STM32WB15CC

2 Description

The STM32WB15CC multiprotocol wireless and ultra-low-power device embeds a powerful

and ultra-low-power radio compliant with the Bluetooth

It contains a dedicated Arm

Cortex® -M0+ for performing all the real-time low layer

Low Energy SIG specification v5.2.

operation.

The device is designed to be extremely low-power and is based on the high-performance

Arm

Cortex®-M4 32-bit RISC core operating at a frequency of up to 64 MHz. This core

features a Floating point unit (FPU) single precision that supports all Arm

®

single-precision data-processing instructions and data types. It also implements a full set of

DSP instructions and a memory protection unit (MPU) that enhances application security.

Enhanced inter-processor communication is provided by the IPCC with six bidirectional

channels. The HSEM provides hardware semaphores used to share common resources

between the two processors.

The device embeds high-speed memories (320 Kbyte of Flash memory, 48 Kbytes of

SRAM) and an extensive range of enhanced I/Os and peripherals.

Direct data transfer between memory and peripherals and from memory to memory is

supported by seven DMA channels with a full flexible channel mapping by the DMAMUX

peripheral.

The device feature several mechanisms for embedded Flash memory and SRAM: readout

protection, write protection and proprietary code readout protection. Portions of the memory

can be secured for Cortex

-M0+ exclusive access.

The AES encryption engine, PKA and RNG enable upper layer cryptography.

The device offers a fast 12-bit ADC and one ultra-low-power comparator.

The device embeds a low-power RTC, one advanced 16-bit timer, one general-purpose

32-bit timer, and two 16-bit low-power timers.

In addition, up to eight capacitive sensing channels are available.

The STM32WB15CC also features standard and advanced communication interfaces,

namely one USART (ISO 7816, IrDA, Modbus and Smartcard mode), one



low- power UART (LPUART), one I2C (SMBus/PMBus), one SPI up to 32 MHz.

The STM32WB15CC operates in the -40 to +85 °C (+105 °C junction) and -40 to +105 °C

(+125

°C junction) temperature ranges from a 1.71 to 3.6 V power supply. A comprehensive

set of power-saving modes enables the design of low-power applications.

The STM32WB15CC integrates a high efficiency SMPS step-down converter with automatic

bypass mode capability when the V

is 2.0

V). It includes independent power supplies for analog input for ADC and comparator.

A V

dedicated supply allows the device to back up the LSE 32.768 kHz oscillator, the

BAT

falls below V

(x=1, 2, 3, 4) voltage level (default

BORx

RTC and the backup registers, thus enabling the STM32WB15CC to supply these functions

even if the main V

is not present through a CR2032-like battery, a Supercap or a small

rechargeable battery.

The STM32WB15CC offers one package, 48 pins.

10/121 DS13258 Rev 1

STM32WB15CC Description

Table 1. STM32WB15CC device features and peripheral counts

Feature STM32WB15CCUxE STM32WB15CCU

Flash memory density 320 KB

SRAM density 48 KB

BLE V5.2 (2 Mbps)

Advanced 1 (16 bits)

Timers

Comm interface

RTC 1

Tamper pin 1

Wakeup pin 2

General 1 (32 bits)

Low power 2 (16 bits)

SysTick 1

SPI 1

I2C 1

USART

(1)

LPUART 1

GPIOs 37 30

Capacitive sensing 8 3

SMPS No Yes

12-bit ADC Number of channels

Internal V

ref

13 channels

(including 3 internal)

Yes

Analog comparator 1

Max CPU frequency 64 MHz

Operating temperature

Ambient operating temperature:-40 to +85 °C and -40 to +105 °C

Junction temperature: -40 to +105 °C and -40 to +125 °C

Operating voltage 1.71 to 3.6 V

Package

1. USART peripheral can be used as SPI master.

UFQFPN48 7 x 7 mm

0.5 mm pitch, solder pad

DS13258 Rev 1 11/121

Description STM32WB15CC

MS53541V3

NVIC

TIM2

PWR

TIM1

GPIO ports

A, B, C, E, H

EXTI

12 KB SRAM1

RTC2

I-WDG

LSE

32 kHz

HSE2

32 MHz

MSI up to

48 MHz

HSI 1% 16 MHz

PLL1

Power supply POR/

PDR/BOR/PVD/AVD

ADC1 12-bit ULP

2.5 Msps / 13 ch

NVIC

JTAG/SWD

AHB Lite

IPCC

Arbiter + ART

320 KB Flash

shared memory

BLE IP

RNG

LSI1

32 kHz

BLE RF IP

LPTIM2

LPTIM1

AES2

DBG

AHB lite (shared)

WKUP

BLE

AHB asynchronous

CRC

RCC + CSS

SYSCFG/COMP

APB asynchronous

RCC2

TSC

HSEM

WWDG

LPUART1

SPI1

I2C1

USART1

PKA + RAM

LSI2

32 kHz

MPU

Cortex-M0+

32 KB SRAM2a

Cortex-M4

(DSP)

4 KB SRAM2b

FPU

CTI CTI

TAMP

DMAMUX

AHB Lite

Temp (

C) sensor

DMA1 - 7 channels

APB

Figure 1. STM32WB15CC block diagram

12/121 DS13258 Rev 1

STM32WB15CC Functional overview

3 Functional overview

3.1 Architecture

The STM32WB15CC multiprotocol wireless device embeds a BLE RF subsystem that

interfaces with a generic microcontroller subsystem using an Arm

CPU1) on which the host application resides.

The RF subsystem is composed of an RF analog front end, BLE block as well as of a

dedicated Arm

The RF subsystem performs all of the BLE stack, reducing the interaction with the CPU1 to

high level exchanges.

Some functions are shared between the RF subsystem CPU (CPU2) and the Host CPU

(CPU1):

 Flash memories

 SRAM1, SRAM2a and SRAM2b (all can be retained in Standby mode)

 Security peripherals (RNG, PKA)

 Clock RCC

 Power control (PWR)

The communication and the sharing of peripherals between the RF subsystem and the

Cortex

controller (IPCC) and semaphore mechanism (HSEM).

Cortex®-M0+ microcontroller (called CPU2), plus proprietary peripherals.

-M4 CPU is performed through a dedicated inter processor communication

3.2 Arm® Cortex®-M4 core with FPU

The Arm® Cortex®-M4 with FPU is a processor for embedded systems. It has been

developed to provide a low-cost platform that meets the needs of MCU implementation, with

a reduced pin count and low-power consumption, while delivering outstanding

computational performance and an advanced response to interrupts.

Cortex®-M4 CPU (called

The Arm® Cortex®-M4 with FPU 32-bit RISC processor features exceptional 

code-efficiency, delivering the high-performance expected from an Arm® core in the

memory size usually associated with 8- and 16-bit devices.

The processor supports a set of DSP instructions enabling efficient signal processing and

complex algorithm execution.

Its single precision FPU speeds up software development by using metalanguage

development tools, while avoiding saturation.

With its embedded Arm® core, the STM32WB15CC is compatible with all Arm® tools and

software.

Figure 1 shows the general block diagram of the device.

DS13258 Rev 1 13/121

Functional overview STM32WB15CC

3.3 Memories

3.3.1 Adaptive real-time memory accelerator (ART Accelerator)

The ART Accelerator is a memory accelerator optimized for STM32 industry-standard Arm®

Cortex

for the Flash memory at higher frequencies.

To release the processor near 80 DMIPS performance at 64 MHz, the accelerator

implements an instruction prefetch queue and branch cache, which increases program

execution speed from the 64-bit Flash memory. Based on CoreMark benchmark, the

performance achieved thanks to the ART accelerator is equivalent to 0 wait state program

execution from Flash memory at a CPU frequency up to 64 MHz.

3.3.2 Memory protection unit

The memory protection unit (MPU) is used to manage the CPU1 accesses to memory to

prevent one task to accidentally corrupt the memory or resources used by any other active

task. This memory area is organized into up to eight protected areas, which can be divided

up into eight subareas. The protection area sizes are between 32 bytes and the whole

-M4 processors. It balances the inherent performance advantage of the Arm®

-M4 over Flash memory technologies, which normally require the processor to wait

Gbytes of addressable memory.

The MPU is especially helpful for applications where some critical or certified code must be

protected against the misbehavior of other tasks. It is usually managed by an RTOS

(real-time operating system). If a program accesses a memory location prohibited by the

MPU, the RTOS detects it and takes action. In an RTOS environment, the kernel can

dynamically update the MPU area setting, based on the process to be executed.

The MPU is optional and can be bypassed for applications that do not need it.

3.3.3 Embedded Flash memory

The STM32WB15CC device features 320 Kbytes of embedded Flash memory available for

storing programs and data, as well as some customer keys.

Flexible protections can be configured thanks to option bytes:

 Readout protection (RDP) to protect the whole memory. Three levels are available:

– Level 0: no readout protection

– Level 1: memory readout protection: the Flash memory cannot be read from or

written to if either debug features are connected, boot in SRAM or bootloader is selected

– Level 2: chip readout protection: debug features (Cortex

JTAG and serial wire), boot in SRAM and bootloader selection are disabled (JTAG fuse). This selection is irreversible.



-M4 and Cortex®-M0+

14/121 DS13258 Rev 1

STM32WB15CC Functional overview

Table 2. Access status vs. readout protection level and execution modes

Area

Main

memory

System

memory

Option

bytes

Backup

registers

SRAM2a SRAM2b

1. The option byte can be modified by the RF subsystem.

2. Erased when RDP changes from Level 1 to Level 0.

Protection

level

1 Yes Yes Yes No No No

2 Yes Yes Yes N/A N/A N/A

1 Yes No No Yes No No

2 Yes No No N/A N/A N/A

1 Yes Yes Yes Yes Yes Yes

2YesNo

1YesYesN/A

2 Yes Yes N/A N/A N/A N/A

1 Yes Yes Yes

2 Yes Yes Yes N/A N/A N/A

User execution

Read Write Erase Read Write Erase

(1)

Debug, boot from SRAM or boot

from system memory (loader)

N/A N/A N/A

(2)

No No N/A

No No No

(2)

 Write protection (WRP): the protected area is protected against erasing and

programming. Two areas can be selected, with 4-Kbyte granularity.

 Proprietary code readout protection (PCROP): two parts of the Flash memory can be

protected against read and write from third parties. The protected area is execute-only: it can only be reached by the STM32 CPU, as an instruction code, while all other accesses (DMA, debug and CPU data read, write and erase) are strictly prohibited. Two areas can be selected, with 2-Kbyte granularity. An additional option bit (PCROP_RDP) makes possible to select if the PCROP area is erased or not when the RDP protection is changed from Level 1 to Level 0.

A section of the Flash memory is secured for the RF subsystem CPU2, and cannot be

accessed by the host CPU1.

The whole non-volatile memory embeds the error correction code (ECC) feature supporting:

 single error detection and correction

 double error detection

 the address of the ECC fail can be read in the ECC register

The embedded Flash memory is shared between CPU1 and CPU2 on a time sharing basis.

A dedicated HW mechanism allows both CPUs to perform Write/Erase operations.

3.3.4 Embedded SRAM

The STM32WB15CC device features 48 Kbytes of embedded SRAM, split in three blocks:

 SRAM1: 12 Kbytes mapped at address 0x2000 0000

 SRAM2a: 32 Kbytes located at address 0x2003 0000 also mirrored at 0x1000 0000,

with hardware parity check

 SRAM2b: 4 Kbytes located at address 0x2003 8000 (contiguous with SRAM2a) and

mirrored at 0x1000 8000 with hardware parity check

DS13258 Rev 1 15/121

Functional overview STM32WB15CC

SRAM2a and SRAM2b can be write-protected, with 1-Kbyte granularity. A section of the

SRAM2a and SRAM2b is secured for the RF sub-system and cannot be accessed by the

host CPU1.

The SRAMs can be accessed in read/write with 0 wait states for all CPU1 and CPU2 clock

speeds.

3.4 Security and safety

The STM32WB15CC contains many security blocks both for the BLE and the Host

application.

It includes:

 Secure Flash memory partition for RF subsystem-only access

 Secure SRAM partition, that can be accessed only by the RF subsystem

 True random number generator (RNG)

 Advance encryption standard hardware accelerator (AES-256bit, supporting chaining

modes ECB, CBC, CTR, GCM, GMAC, CCM)

 Private key acceleration (PKA) including:

– Modular arithmetic including exponentiation with maximum modulo size of 3136

bits

– Elliptic curves over prime field scalar multiplication, ECDSA signature, ECDSA

verification with maximum modulo size of 521 bits

 Cyclic redundancy check calculation unit (CRC)

A specific mechanism is in place to ensure that all the code executed by the RF subsystem

CPU2 can be secure, whatever the Host application.

3.5 Boot modes and FW update

At startup, BOOT0 pin and BOOT1 option bit are used to select one of three boot options:

 Boot from user Flash

 Boot from system memory

 Boot from embedded SRAM

The device always boots on CPU1 core. The embedded bootloader code makes it possible

to boot from various peripherals:

 UART

 I2C

 SPI

Secure Firmware update from system boot is provided.

3.6 RF subsystem

The STM32WB15CC embed an ultra-low power multi-standard radio Bluetooth® Low

Energy (BLE), compliant with Bluetooth

Mbps transfer rates, supports multiple roles simultaneously acting at the same time as

specification v5.2. The BLE features 1 Mbps and

16/121 DS13258 Rev 1

STM32WB15CC Functional overview

BLE sensor and hub device, embeds Elliptic Curve Diffie-Hellman (ECDH) key agreement

protocol, thus ensuring a secure connection.

The BLE stack runs on an embedded Arm® Cortex®-M0+ core (CPU2). The stack is stored

on the embedded Flash memory, which is also shared with the Arm

application, making it possible in-field stack update.

3.6.1 RF front-end block diagram

The RF front-end is based on a direct modulation of the carrier in Tx, and uses a low IF

architecture in Rx mode.

Thanks to an internal transformer at RF pins, the circuit directly interfaces the antenna

(single ended connection, impedance close to 50 ). The natural bandpass behavior of the

internal transformer, simplifies outside circuitry aimed for harmonic filtering and out of band

interferer rejection.

In Transmit mode, the maximum output power is user selectable through the programmable

LDO voltage of the power amplifier. A linearized, smoothed analog control offers clean

power ramp-up.

In receive mode the circuit can be used in standard high performance or in reduced power

consumption (user programmable). The Automatic gain control (AGC) is able to reduce the

chain gain at both RF and IF locations, for optimized interference rejection. Thanks to the

use of complex filtering and highly accurate I/Q architecture, high sensitivity and excellent

linearity can be achieved.

The bill of material is reduced thanks to the high degree of integration. The radio frequency

source is synthesized form an external 32 MHz crystal that does not need any external

trimming capacitor network thanks to a dual network of user programmable integrated

capacitors.

Cortex®-M4 (CPU1)

DS13258 Rev 1 17/121

Functional overview STM32WB15CC

MS53542V2

Note: UFQFPN48: V

through exposed pad, and V

SSRF

pin must be connected to ground plane

filter

ADC

PLL

Modulator

RF1

Adjust

32 MHz

OSC_OUTOSC_IN

PA ramp

generator

AGC

control

BLE

modulator

BLE

demodulator

BLE

controller

RF control

AGC

Timer and Power

control

LDO LDO LDO

FBSMPS

Trimmed

bias

DDRF

Max PA

level

SMPS

LXSMPS

DDSMPSVSSSMPS

Adjust

HSE

LNA

Wakeup

Interrupt

AHB

APB

See note

RF_TX_

MOD_

EXT_PA

Figure 2. STM32WB15CC RF front-end block diagram

3.6.2 BLE general description

The BLE block is a master/slave processor, compliant with Bluetooth specification 5.2

standard (2

It integrates a 2.4 GHz RF transceiver and a powerful Cortex®-M0+ core, on which a

Mbps).

complete power-optimized stack for Bluetooth Low Energy protocol runs, providing

master

/ slave role support

 GAP: central, peripheral, observer or broadcaster roles

 ATT/GATT: client and server

 SM: privacy, authentication and authorization

 L2CAP

 Link layer: AES-128 encryption and decryption

18/121 DS13258 Rev 1

STM32WB15CC Functional overview

In addition, according to Bluetooth specification v5.2, the BLE block provides:

 Multiple roles simultaneous support

 Master/slave and multiple roles simultaneously

 LE data packet length extension (making it possible to reach 800 kbps at application

level)

 LE privacy 1.2

 LE secure connections

 Flexible Internet connectivity options

 High data rate (2 Mbps)

The device allows the applications to meet the tight peak current requirements imposed by

the use of standard coin cell batteries. When the high efficiency embedded SMPS

step-down converter is used, the RF front end consumption (I

) is only TBD mA at the

tmax



highest output power (TBD dBm).

Ultra-low-power sleep modes and very short transition time between operating modes result

in very low average current consumption during real operating conditions, resulting in longer

battery life.

The BLE block integrates a full bandpass balun, thus reducing the need for external

components.

The link between the Cortex®-M4 application processor (CPU1) running the application, and

the BLE stack running on the dedicated Cortex

-M0+ (CPU2) is performed through a

normalized API, using a dedicated IPCC.

3.6.3 RF pin description

The RF block contains dedicated pins, listed in Table 3.

Name Type Description

RF1

OSC_OUT

OSC_IN

RF_TX_

MOD_EXT_PA

VDDRF V

VSSRF

1. On packages with exposed pad, this pad must be connected to GND plane for correct RF operation.

(1)

RF Input/output, must be connected to the antenna through a low-pass matching network

32 MHz main oscillator, also used as HSE source

I/O

External PA transmit control

Dedicated supply, must be connected to V

VSSTo be connected to GND

Table 3. RF pin list

3.6.4 Typical RF application schematic

The schematic in Figure 3 and the external components listed in Table 3 are purely

indicative. For more details refer to the “Reference design” provided in separate documents.

DS13258 Rev 1 19/121

Functional overview STM32WB15CC

MS53575V1

STM32WB

microcontroller

OSC_IN

OSC_OUT

VDDRF

VSSRF

RF1

Antenna

Cf1 Cf2

Lf1

Lf2

Antenna filter

(including exposed pad)

32 MHz

Figure 3. External components for the RF part

Component Description Value

C1 Decoupling capacitance for RF 100 nF // 100 pF

X1 32 MHz crystal

Antenna filter Antenna filter and matching network Refer to AN5165, on www.st.com

Antenna 2.4 GHz band antenna -

1. e.g. NDK reference: NX2016SA 32 MHz EXS00A-CS06654.

Table 4. Typical external components

(1)

32 MHz

Note: For more details refer to AN5165 “Development of RF hardware using STM32WB

microcontrollers” available on www.st.com.

3.7 Power supply management

3.7.1 Power supply distribution

The device integrate an SMPS step-down converter to improve low power performance

when the V

automatically enters in bypass mode when the V

(x = 1, 2, 3 or 4) voltage.

By default, at Reset the SMPS is in bypass mode.

The device can be operated without the SMPS by just wiring its output to VDD. This is the

case for applications where the voltage is low, or where the power consumption is not

critical.

voltage is high enough. This converter has an intelligent mode that

voltage falls below a specific BORx 

20/121 DS13258 Rev 1

STM32WB15CC Functional overview

MS41409V4

LPR

RFR

SMPS

(not used)

LPR

RFR

SMPS configuration LDO configuration

VDDSMPS

VLXSMPS

VFBSMPS

SMPS

SMPS mode or BYPASS mode

VDDSMPS

VLXSMPS

VFBSMPS

Figure 4. Power distribution

Table 5. Power supply typical components

Component Description Value

C2 SMPS output capacitor

(2)

1. e.g. GRM155R60J475KE19.

2. An extra 10 nH inductor in series with L1 is needed to improve the receiver performance,  e.g Murata LQG15WZ10NJ02D

3. e.g. Wurth 74479774222.

4. e.g. Murata LQM21FN100M70L.

SMPS inductance

(1)

For 8 MHz

For 4 MHz

(3)

(4)

4.7 µF

2.2 µH

10 µH

The SMPS can also be switched on or set in bypass mode at any time by the application software, for example when very accurate ADC measurement are needed.

3.7.2 Power supply schemes

The device has different voltage supplies (see Figure 6) and can operate within the following voltage ranges:

 V

During power up/down, the following power sequence requirements must be respected:

 When VDD is below 1 V the other power supply (V

 When V

= 1.71 to 3.6 V: external power supply for I/Os (V

), the internal regulator and

DDIO

system functions such as RF, SMPS, reset, power management and internal clocks. It is provided externally through VDD pins. V

DDRF

and V

DDSMPS

must be always

connected to VDD pins.

= 1.62 (ADC/COMPs) to 3.6 V: external analog power supply for ADC and

DDA

comparator. The V not used V

+ 300 mV

must be connected to VDD.

DDA

is above 1 V all power supplies are independent.

voltage level can be independent from the VDD voltage. When

DDA

), must remain below

DDA

DS13258 Rev 1 21/121

Functional overview STM32WB15CC

MSv47490V1

0.3

BOR0

3.6

Operating modePower-on Power-down time

DDX

(1)

Invalid supply area V

DDX

< V

+ 300 mV

DDX

independent from V

Figure 5. Power-up/down sequence

1. V

DDX

During the power down phase, VDD can temporarily become lower than other supplies only if the energy provided to the MCU remains below 1 mJ. This allows the external decoupling capacitors to be discharged with different time constants during the power down transient phase.

Note: VDD, V

sequence.

refers to V

and V

DDRF

DDA

DDSMPS

must be wired together, so they can follow the same voltage

22/121 DS13258 Rev 1

STM32WB15CC Functional overview

MS53544V2

VBAT

IOs

Wakeup domain (V

DDIO

)

Analog domain

Interruptible domain (V

DD12I

)

Switch domain (V

)

(CPU1, CPU2,

peripherals)

Level shifter

Power switch

BAT

ADC

DDA

REF-

HSI, HSE, PLL, LSI1,

LSI2, IWDG,

IOs

logic

REF+

LSE, RTC,

backup

registers

logic

Backup domain

SMPS

Power switch

BKP12

SRAM1,

SRAM2b,

SRAM2a

Power switch

On domain (V

DD12O

)

Power switch

SysConfig, EXTI,

RCC, PwrCtrl,

LPTIM, LPUSART

LPR

RFR

LXSMPS

FBSMPS

DDSMPS

RF domain

Radio

DDRF

SSRF

(including exposed pad)

SSSMPS

Figure 6. Power supply overview

DS13258 Rev 1 23/121

Functional overview STM32WB15CC

3.7.3 Linear voltage regulator

Three embedded linear voltage regulators supply most of the digital and RF circuitries, the main regulator (MR), the low-power regulator (LPR) and the RF regulator (RFR).

 The MR is used in the Run and Sleep modes and in the Stop 0 mode.

 The LPR is used in Low-Power Run, Low-Power Sleep and Stop 1 modes. It is also

used to supply the SRAMs in Standby with retention.

 The RFR is used to supply the RF analog part, its activity is automatically managed by

the RF subsystem.

All the regulators are in power-down in Standby and Shutdown modes: the regulator output is in high impedance, and the kernel circuitry is powered down, inducing zero consumption.

The ultralow-power STM32WB15CC supports dynamic voltage scaling to optimize its power consumption in run mode. The voltage from the main regulator that supplies the logic (VCORE) can be adjusted according to the system’s maximum operating frequency.

VCORE can also be supplied by the low-power regulator, the main regulator being switched off. The system is then in Low-power run mode. In this case the CPU is running at up to 2

MHz, and peripherals with independent clock can be clocked by HSI16 (in this mode the

RF subsystem is not available).

3.7.4 Power supply supervisor

An integrated ultra-low-power brown-out reset (BOR) is active in all modes except Shutdown ensuring proper operation after power-on and during power down. The device remains in reset mode when the monitored supply voltage V threshold, without the need for an external reset circuit.

The lowest BOR level is 1.71 V at power on, and other higher thresholds can be selected through option bytes.The device features an embedded programmable voltage detector (PVD) that monitors the V interrupt can be generated when V higher than the V

threshold. The interrupt service routine can then generate a warning

PVD

message and/or put the MCU into a safe state. The PVD is enabled by software.

In addition, the device embeds a peripheral voltage monitor (PVM) that compares the independent supply voltage V functional supply range.

Any BOR level can also be used to automatically switch the SMPS step-down converter in bypass mode when the V operation is selectable by register bit, the BOR level is selectable by option byte.

3.7.5 Low-power modes

This ultra-low-power device supports several low-power modes to achieve the best compromise between low-power consumption, short startup time, available peripherals and available wakeup sources.

is below a specified

power supply and compares it with the V

DDA

voltage drops below a given voltage level. The mode of

drops below the V

threshold and/or when VDD is

PVD

with a fixed threshold to ensure that the peripheral is in its

threshold. An

PVD

24/121 DS13258 Rev 1

STM32WB15CC Functional overview

By default, the microcontroller is in Run mode, after a system or a power on Reset. It is up to the user to select one of the low-power modes described below:

 Sleep

In Sleep mode, only the CPU1 is stopped. All peripherals, including the RF subsystem, continue to operate and can wake up the CPU when an interrupt/event occurs.

 Low-power run

This mode is achieved with VCORE supplied by the low-power regulator to minimize the regulator operating current. The code can be executed from SRAM or from the Flash memory, and the CPU1 frequency is limited to 2 MHz. The peripherals with independent clock can be clocked by HSI16. The RF subsystem is not available in this mode and must be OFF.

 Low-power sleep

This mode is entered from the low-power run mode. Only the CPU1 clock is stopped. When wakeup is triggered by an event or an interrupt, the system reverts to the  low-power run mode. The RF subsystem is not available in this mode and must be OFF.

 Stop 0 and Stop 1

Stop modes achieve the lowest power consumption while retaining the content of all the SRAM and registers. The LSE (or LSI) is still running.

The RTC can remain active (Stop mode with RTC, Stop mode without RTC).

Some peripherals with wakeup capability can enable the HSI16 RC during Stop modes to detect their wakeup condition.

Two modes are available: Stop 0 and Stop 1.

Stop 1 offers several active peripherals and wakeup sources. In Stop 0 mode the main regulator remains ON, allowing a very fast wakeup time but with higher consumption.

In these modes the RF subsystem can wait for incoming events in all Stop modes.

The system clock when exiting from Stop 0 or Stop1 modes can be either MSI up to 48 MHz or HSI16 if the RF subsystem is disabled. If the RF subsystem is used the exits must be set to HSI16 only.

 Standby

The Standby mode is used to achieve the lowest power consumption with BOR. The internal regulator is switched off so that the VCORE domain is powered off.

The RTC can remain active (Standby mode with RTC).

The brown-out reset (BOR) always remains active in Standby mode.

The state of each I/O during standby mode can be selected by software: I/O with internal pull-up, internal pull-down or floating.

After entering Standby mode, register content is lost except for registers in the Backup domain and Standby circuitry. Optionally, SRAMs can be retained in Standby mode, supplied by the low-power regulator (Standby with 48 KB SRAM retention mode).

The device exits Standby mode when an external reset (NRST pin), an IWDG reset, WKUP pin event (configurable rising or falling edge), or an RTC event occurs (alarm, periodic wakeup, timestamp, tamper) or a failure is detected on LSE (CSS on LSE, or from the RF system wakeup).

The system clock after wakeup is 16 MHz, derived from the HSI16

DS13258 Rev 1 25/121

Functional overview STM32WB15CC

In this mode the RF can be used.

 Shutdown

The Shutdown mode allows to achieve the ultimate lowest power consumption. The internal regulator is switched off so that the VCORE domain is powered off.

The RTC can remain active (Shutdown mode with RTC, Shutdown mode without RTC).

The BOR is not available in Shutdown mode. No power voltage monitoring is possible in this mode, therefore the switch to Backup domain is not supported.

SRAM1, SRAM2a, SRAM2b and register contents are lost except for registers in the Backup domain.

The device exits Shutdown mode when an external reset (NRST pin), a WKUP pin event (configurable rising or falling edge), or an RTC event occurs (alarm, periodic wakeup, timestamp, tamper).

The system clock after wakeup is 4 MHz, derived from the MSI.

In this mode the RF is no longer operational.

When the RF subsystem is active, it changes the power state according to its needs (Run, Stop, Standby). This operation is transparent for the CPU1 host application and managed by a dedicated HW state machine. At any given time the effective power state reached is the higher one needed by both the CPU1 and RF sub-system.

Tab l e 6 summarizes the peripheral features over all available modes. Wakeup capability is

detailed in gray cells.

Table 6. Functionalities depending on system operating mode

(1)

Stop0 Stop1 Standby Shutdow

Peripheral

Run

Sleep

Low-power run

Low-power sleep

Wakeup capability

VBAT

Wakeup capability

CPU1 Y - Y - - --------

CPU2 Y - Y - -

Radio-system (BLE) Y Y - - -

Flash memory Y Y O O R

SRAM1 Y O

SRAM2a Y O

SRAM2b Y O

(3)

Backup registers Y Y Y Y R

Brown-out reset (BOR) Y Y Y Y Y

Brown-out SMPS force bypass (BOR)

Programmable voltage detector (PVD)

YYYY Y

OOO O O

--------

Y-Y-Y

(2)

- --

-R-R-R-R

R -R-O

(2)

----

(2)

----

(2)

----

-R-R-R-R

YYYYY- --

Y- ------

OOO- ----

26/121 DS13258 Rev 1

STM32WB15CC Functional overview

Table 6. Functionalities depending on system operating mode

Stop0 Stop1 Standby Shutdow

Peripheral

Peripheral voltage monitor (PVMx; x=3)

DMAx (x=1) O O O O -

High speed internal (HSI16) O O O O O

High speed external (HSE) O O O O -

Low speed internal (LSI) O O O O O

Low speed external (LSE) O O O O O

Multi-speed internal (MSI) O O O O -

Clock security system (CSS) O O O O -

Clock security system on LSE O O O O O

RTC / Auto wakeup O O O O O

Run

Sleep

Low-power run

Low-power sleep

OOO O O

(4)

Wakeup capability

OOO- ----

--------

(4)

-O

--------

-O-O----

-O-O-O-O

--------

OOOOO- --

OOOOOOOO

(1)

(continued)

VBAT

Wakeup capability

------

Number of RTC tamper pins 1 1 1 1 1

USART1 O O O O O

Low-power UART (LPUART) O O O O O

I2C1 O O O O O

SPIx (x=1) O O O O -

ADC1 O O O O -

COMPx (x=1) O O O O O

Temperature sensor O O O O -

Timers (TIMx) O O O O -

Low-power timer 1 (LPTIM1) O O O O O

Low-power timer 2 (LPTIM2) O O O O O

Independent watchdog (IWDG) O O O O O

Window watchdog (WWDG) O O O O -

SysTick timer O O O O -

Touch sensing controller (TSC) O O O O -

True random number generator (RNG)

OO - - -

O1O1O1O1

(5)O(5)O(5)O(5)

(6)O(6)O(6)O(6)

- ----

--------

OOO- ----

--------

OOO- ----

OOOOO- --

--------

AES hardware accelerator O O O O - --------

CRC calculation unit O O O O -

--------

DS13258 Rev 1 27/121

Functional overview STM32WB15CC

Table 6. Functionalities depending on system operating mode

(1)

(continued)

Stop0 Stop1 Standby Shutdow

Peripheral

Run

Sleep

Low-power run

Low-power sleep

Wakeup capability

IPCC O - O - - --------

HSEM O - O - -

PKA O O O O -

GPIOs O O O O O

1. Legend: Y = Yes (enabled). O = Optional (disabled by default, can be enabled by software).  R = data retained. - = Not available. Gray cells indicate Wakeup capability.

2. The SRAM1, SRAM2a and SRAM2b content needs to be retained via the PWR_CR3.RRS bit.

3. The SRAM clock can be gated on or off.

4. Some peripherals with wakeup from Stop capability can request HSI16 to be enabled. In this case, HSI16 is woken up by the peripheral, and only feeds the peripheral which requested it. HSI16 is automatically put off when the peripheral does not need it anymore.

5. UART and LPUART reception is functional in Stop mode, and generates a wakeup interrupt on Start, address match or received frame event.

6. I2C address detection is functional in Stop mode, and generates a wakeup interrupt in case of address match.

7. I/Os can be configured with internal pull-up, pull-down or floating in Standby mode.

8. The I/Os with wakeup from Standby/Shutdown capability are PA0 and PA2.

9. I/Os can be configured with internal pull-up, pull-down or floating in Shutdown mode but the configuration is lost when exiting the Shutdown mode.

--------

OOO

(7)

pins

(8)

(9)

pins

(9)

VBAT

28/121 DS13258 Rev 1

Table 7. STM32WB15CC modes overview

Mode Regulator CPU1 Flash SRAM Clocks DMA and Peripherals Wakeup source Consumption

Run MR Yes ON

LPRun LPR Yes ON

Sleep MR No ON

(2)

ON Any All N/A 91 µA/MHz N/A

Any

except

All except RF and RNG N/A 90 µA/MHz TBD µs

PLL

(3)

Any All

Any interrupt

or event

28 µA/MHz TBD cycles

(1)

STM32WB15CC Functional overview

Wakeup time

Any

except

All except RF and RNG

LPSleep LPR No ON

(2)

(3)

PLL

RF, BOR, PVD, PVM, RTC,

DS13258 Rev 1 29/121

Stop 0 MR No OFF ON

LSE, LSI,

(4)

HSE

(5)

HSI16

IWDG, COMPx (x=1),

USART1

I2C1

(6)

(7)

, LPTIMx (x=1, 2), SMPS

All other peripherals are frozen.

RF, BOR, PVD, PVM, RTC,

IWDG, COMPx (x=1),

USART1

I2C1

(6)

(7)

, LPTIMx (x=1, 2)

Stop 1 LPR No OFF ON

LSE, LSI,

(4)

HSE

(5)

HSI16

All other peripherals are frozen.

RF, BOR, RTC, IWDG

All other peripherals are

powered off.

I/O configuration can be floating,

Standby

LPR

SRAMs

No OFF

OFF OFF

LSE, LSI

pull-up or pull-down

RTC

All other peripherals are

Shutdown OFF No OFF OFF LSE

powered off.

I/O configuration can be floating,

pull-up or pull-down

1. Typical current at VDD = 1.8 V, 25 °C. for STOPx, SHUTDOWN and Standby, else VDD = 3.3 V, 25 °C.

, LPUART1

(9)

(6)

Any interrupt

or event

Reset pin, all I/Os, RF,

BOR, PVD, PVM,

RTC, IWDG, COMPx

(x=1), USART1,

LPUART1, I2C1,

LPTIMx (x=1, 2)

Reset pin, all I/Os

RF, BOR, PVD, PVM,

RTC, IWDG, COMPx

(x=1), USART1,

LPUART1, I2C1,

LPTIMx (x=1, 2)

RF, Reset pin

Two I/Os (WKUPx)

BOR, RTC, IWDG

Two I/Os (WKUPx)

RTC

27 µA/MHz TBD cycles

100 µA TBD µs

3.05 µA w/o RTC

3.35 µA w RTC

0.335 µA w/o RTC

0.61 µA w RTC

(8)

0.243 µA w/o RTC

0.518 µA w RTC

(8)

0.012 µA w/o RTC

0.210 µA w/ RTC

TBD µs

30/121 DS13258 Rev 1

2. The Flash memory controller can be placed in power-down mode if the RF subsystem is not in use and all the program is run from the SRAM.

3. The SRAM1 and SRAM2 clocks can be gated off independently.

4. HSE (32 MHz) automatically used when RF activity is needed by the RF subsystem.

5. HSI16 (16 MHz) automatically used by some peripherals.

6. U(S)ART and LPUART reception is functional in Stop mode, and generates a wakeup interrupt on Start, Address match or Received frame event.

7. I2C address detection is functional in Stop mode, and generates a wakeup interrupt in case of address match.

8. I/Os with wakeup from Standby/Shutdown capability: PA0, PA2.

9. I/Os can be configured with internal pull-up, pull-down or floating but the configuration is lost immediately when exiting the Shutdown mode.

Functional overview STM32WB15CC

STM32WB15CC Functional overview

3.7.6 Reset mode

To improve the consumption under reset, the I/Os state under and after reset is “analog state” (the I/O Schmitt trigger is disabled). In addition, the internal reset pull-up is deactivated when the reset source is internal.

3.8 VBAT operation

The VBAT pin allows to power the device VBAT domain (RTC, LSE and Backup registers) from an external battery, an external supercapacitor, or from V

when no external battery

nor an external supercapacitor are present. One anti-tamper detection pin is available in VBAT mode.

VBAT operation is automatically activated when VDD is not present.

An internal VBAT battery charging circuit is embedded and can be activated when VDD is present.

Note: When the microcontroller is supplied only from VBAT, external interrupts and RTC

alarm/events do not exit it from VBAT operation.

3.9 Interconnect matrix

TIMx

COMPx

Several peripherals have direct connections between them. This allows autonomous communication between peripherals, saving CPU1 resources and, consequently, reducing power supply consumption. In addition, these hardware connections result in fast and predictable latency.

Depending on peripherals, these interconnections can operate in Run, Sleep, Low-power run and Sleep, Stop 0 and Stop 1 modes.

Table 8. STM32WB15CC CPU1 peripherals interconnect matrix

Source Destination Action

TIMx Timers synchronization or chaining Y Y Y Y -

ADC1 Conversion triggers Y Y Y Y -

DMA Memory to memory transfer trigger Y Y Y Y -

COMP1 Comparator output blanking Y Y Y Y -

TIM1 TIM2

LPTIMERx

Timer input channel, trigger, break from analog signals comparison

Low-power timer triggered by analog signals comparison

Run

Sleep

Low-power run

YYYY -

YYYYY

Low-power

Stop 0 / Stop 1

ADC1 TIM1 Timer triggered by analog watchdog Y Y Y Y -

RTC

LPTIMERx

Low-power timer triggered by RTC alarms or tampers

DS13258 Rev 1 31/121

YYYYY

Functional overview STM32WB15CC

Table 8. STM32WB15CC CPU1 peripherals interconnect matrix (continued)

Source Destination Action

All clock sources (internal and external)

CSS CPU (hard fault) SRAM (parity error) Flash memory (ECC error) COMP1 PVD

GPIO

Run

Sleep

Low-power

Low-power run

TIM2

TIM1 Timer break Y Y Y Y -

TIMx External trigger Y Y Y Y -

LPTIMERx External trigger Y Y Y Y Y

ADC1 Conversion external trigger Y Y Y Y -

Clock source used as input channel for RC measurement and trimming

YYYY -

Stop 0 / Stop 1

32/121 DS13258 Rev 1

STM32WB15CC Functional overview

3.10 Clocks and startup

The STM32WB15CC device integrates several clock sources:

 LSE: 32.768 kHz external oscillator, for accurate RTC and calibration with other

embedded RC oscillators

 LSI1: 32 kHz on-chip low-consumption RC oscillator

 LSI2: TBD kHz (untrimmable), on-chip temperature stable RC oscillator

 HSE: high quality 32 MHz external oscillator with trimming, needed by the RF

subsystem

 HSI16: 16 MHz high accuracy on-chip RC oscillator

 MSI: 100 kHz to 48 MHz multiple speed on-chip low power oscillator, can be trimmed

using the LSE signal

The clock controller (see Figure 7) distributes the clocks coming from the different oscillators to the core and the peripherals including the RF subsystem. It also manages clock gating for low power modes and ensures clock robustness. It features:

 Clock prescaler: to get the best trade-off between speed and current consumption,

the clock frequency to the CPU and peripherals can be adjusted by a programmable prescaler

 Safe clock switching: clock sources can be changed safely on the fly in run mode

through a configuration register.

 Clock management: to reduce power consumption, the clock controller can stop the

clock to the core, individual peripherals or memory.

 System clock source: four different clock sources can be used to drive the master

clock SYSCLK:

– 16 MHz high-speed internal RC oscillator (HSI16), trimmable by software, that can

supply a PLL

– Multispeed internal RC oscillator (MSI), trimmable by software, able to generate

12 frequencies from 100 kHz to 48 MHz. When a 32.768 kHz clock source is available in the system (LSE), the MSI frequency can be automatically trimmed by hardware to reach better than ±0.25% accuracy. The MSI can supply a PLL.

– System PLL that can be fed by HSE, HSI16 or MSI, with a maximum frequency of

64 MHz.

 Auxiliary clock source: two ultralow-power clock sources that can be used to drive

the real-time clock:

– 32.768 kHz low-speed external crystal (LSE), supporting four drive capability

modes. The LSE can also be configured in bypass mode for an external clock.

– 32 kHz low-speed internal RC (LSI1), also used to drive the independent

watchdog. The LSI1 clock accuracy is ±5%.

– TBD kHz low-speed internal RC (LSI2), with TBD stability over temperature.

 Peripheral clock sources: Several peripherals (RNG, USARTs, I2C, LPTimers, ADC)

have their own independent clock whatever the system clock. A PLL having three

DS13258 Rev 1 33/121

Functional overview STM32WB15CC

independent outputs for the highest flexibility can generate independent clocks for the ADC and the RNG.

 Startup clock: after reset, the microcontroller restarts by default with an internal 4 MHz

clock (MSI). The prescaler ratio and clock source can be changed by the application program as soon as the code execution starts.

 Clock security system (CSS): this feature can be enabled by software. If an HSE

clock failure occurs, the master clock is automatically switched to HSI16 and a software interrupt is generated if enabled. LSE failure can also be detected and an interrupt generated.

 Clock-out capability:

– MCO: microcontroller clock output: it outputs one of the internal clocks for

external use by the application. Low frequency clocks (LSIx, LSE) are available down to Stop 1 low power state.

– LSCO: low speed clock output: it outputs LSI or LSE in all low-power modes

down to Standby.

Several prescalers allow the user to configure the AHB frequencies, the high speed APB (APB2) and the low speed APB (APB1) domains. The maximum frequency of the AHB and the APB domains is 64 MHz.

34/121 DS13258 Rev 1

STM32WB15CC Functional overview

MS53136V3

SMPS clock

source control

LSI1 RC 32 kHz

LSI2 RC 32 kHz

LSE OSC

32.768 kHz

LSCO

LSI

to IWDG

HSE OSC

32 MHz

HSE CSS

OSC_IN

OSC_OUT

HSI16 RC

16 MHz

MSI RC

100 kHz - 48 MHz

MCO

/1 - 16

/32

LSE CSS

/32

PLL

SYSCLK

MSI

HSI

HSI16

HSE PRE

HSE

PLLRCLK

LSE

LSI2

LSI1

SYS clock

source control

SYSCLK

MSI

HSI16

HSEPRE

HCLK1

HCLK2

HCLK4

APB1

PPRE1

/1,2,4,8,16

to CPU1, AHB1, AHB2 and SRAM1

to CPU1 FCLK

to CPU1 system timer

APB2

PPRE2

/1,2,4,8,16

PCLK1

PCLK2

to CPU2

to CPU2 FCLK

to CPU2 system timer

to AHB4, Flash memory and SRAM2

to APB1 TIMx

to APB2 TIMx

to USART1

to LPTIMx

to LPUART1

to ADC

to RTC

x1 or

to I2C1

PCLKn

SYSCLK

HSI16

PCLKn

LSI

LSE

PLLPCLK

SYSCLK

PCLKn

LSE

to BLE wakeup

HCLK5

HSI

HSE

to AHB5

to APB3

to APB2

to APB1

to RF

SYSCLK

MSI

PLLQCLK

PLLRCLK

OSC32_IN

OSC32_OUT

LSI

LSE

MSI

HSI

HSE

SMPSDIV

/1,2,3,4,6,8,12

to SMPS

CPU1 HPRE

/1,2,...,512

AHBS

SHDHPRE

/1,2,...,512

CPU2 C2HPRE 1,2,...,512

HSI16

to RNG

LSI

LSE

HSE PRE

/1,2

SMPSDIV

/1,2,4

HSI_V33

HSI

PLLPCLK

Figure 7. Clock tree

3.11 General-purpose inputs/outputs (GPIOs)

Each of the GPIO pins can be configured by software as output (push-pull or open-drain), as input (with or without pull-up or pull-down) or as peripheral alternate function. Most of the GPIO pins are shared with digital or analog alternate functions. Fast I/O toggling can be achieved thanks to their mapping on the AHB2 bus.

The I/Os alternate function configuration can be locked, if needed, following a specific sequence in order to avoid spurious writing to the I/Os registers.

DS13258 Rev 1 35/121

Functional overview STM32WB15CC

3.12 Direct memory access controller (DMA)

The device embeds one DMA. Refer to Tabl e 9 for the features implementation.

Direct memory access (DMA) is used to provide high-speed data transfer between peripherals and memory as well as between memories. Data can be quickly moved by DMA without any CPU action. This keeps CPU resources free for other operations.

The DMA controller has seven channels in total, a full cross matrix allows any peripheral to be mapped on any of the available DMA channels. The DMA has an arbiter for handling the priority between DMA requests.

The DMA supports:

 seven independently configurable channels (requests)

 A full cross matrix between peripherals and all the DMA channels exist. There is also a

HW trigger possibility through the DMAMUX.

 Priorities between requests from DMA channels are software programmable (four

levels consisting in very high, high, medium and low) or hardware in case of equality (request 1 has priority over request 2, etc.).

 Independent source and destination transfer size (byte, half word, word), emulating

packing and unpacking. Source/destination addresses must be aligned on the data size.

 Support for circular buffer management.

 Three event flags (DMA half transfer, DMA transfer complete and DMA transfer error)

logically OR-ed together in a single interrupt request for each channel.

 Memory-to-memory transfer.

 Peripheral-to-memory and memory-to-peripheral, and peripheral-to-peripheral

transfers.

 Access to Flash memory, SRAM, APB and AHB peripherals as source and destination.

 Programmable number of data to be transferred: up to 65536.

Number of regular channels 7

Table 9. DMA implementation

DMA features DMA1

A DMAMUX block makes it possible to route any peripheral source to any DMA channel.

3.13 Interrupts and events

3.13.1 Nested vectored interrupt controller (NVIC)

The device embeds a nested vectored interrupt controller able to manage 16 priority levels, and handle up to 63 maskable interrupt channels plus the 16 interrupt lines of the Cortex®-M4 with FPU.

36/121 DS13258 Rev 1

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STM32WB15CC Functional overview

The NVIC benefits are the following:

 Closely coupled NVIC gives low latency interrupt processing

 Interrupt entry vector table address passed directly to the core

 Allows early processing of interrupts

 Processing of late arriving higher priority interrupts

 Support for tail chaining

 Processor state automatically saved

 Interrupt entry restored on interrupt exit with no instruction overhead

The NVIC hardware block provides flexible interrupt management features with minimal interrupt latency.

3.13.2 Extended interrupts and events controller (EXTI)

The EXTI manages wakeup through configurable and direct event inputs. It provides  wake-up requests to the Power control, and generates interrupt requests to the CPUx NVIC and events to the CPUx event input.

Configurable events/interrupts come from peripherals able to generate a pulse, and make it possible to select the Event/Interrupt trigger edge and/or a SW trigger.

Direct events/interrupts are coming from peripherals having their own clearing mechanism.

3.14 Analog to digital converter (ADC)

The 12-bit analog-to-digital converter has up to ten external and three internal (temperature sensor, voltage reference, VBAT voltage measurement) channels and performs conversions in single-shot or scan modes. In scan mode, automatic conversion is performed on a selected group of analog inputs.

An analog watchdog feature makes possible a very precise monitoring of the converted voltage of one, some or all selected channels. An interrupt is generated when the converted voltage is outside the programmed thresholds.

3.14.1 Temperature sensor

The temperature sensor (TS) generates a voltage VTS that varies linearly with temperature.

The temperature sensor is internally connected to the ADC1_IN12 input channel, which is used to convert the sensor output voltage into a digital value.

To improve the accuracy of the temperature sensor measurement, each device is individually factory-calibrated by ST. The temperature sensor factory calibration data are stored in the system memory area, accessible in read-only mode.

DS13258 Rev 1 37/121

Functional overview STM32WB15CC

Calibration value name Description Memory address

TS_CAL1

TS_CAL2

Table 10. Temperature sensor calibration values

TS ADC raw data acquired at a temperature of 30 °C (± 5 °C), V

DDA

TS ADC raw data acquired at a temperature of 130 °C (± 5 °C), V

DDA

3.14.2 Internal voltage reference (V

The internal voltage reference (VREFINT) provides a stable (bandgap) voltage output for the ADC and the comparator. VREFINT is internally connected to the ADC1_IN13 input channel. The precise voltage of VREFINT is individually measured for each part by ST during production test and stored in the system memory area. It is accessible in read-only mode.

Calibration value name Description Memory address

Table 11. Internal voltage reference calibration values

Raw data acquired at a

VREFINT

temperature of 30 °C (± 5 °C), V

DDA

= 3.0 V (± 10 mV)

REFINT

= 3.6 V (± 10 mV)

)

0x1FFF 75A8 - 0x1FFF 75A9

0x1FFF 75CA - 0x1FFF 75CB

0x1FFF 75AA - 0x1FFF 75AB

3.15 Comparator (COMP)

The STM32WB15CC devices embeds a comparator with programmable reference voltage (internal or external), hysteresis and speed (low speed for low-power) and with selectable output polarity.

The reference voltage can be one of the following:

 External I/O

 Internal reference voltage or submultiple (1/4, 1/2, 3/4).

The comparator can wake up from Stop mode, generate interrupts and breaks for the timers and can be also combined into a window comparator.

3.16 Touch sensing controller (TSC)

The touch sensing controller provides a simple solution for adding capacitive sensing functionality to any application. Capacitive sensing technology is able to detect finger presence near an electrode which is protected from direct touch by a dielectric such as glass or plastic. The capacitive variation introduced by the finger (or any conductive object) is measured using a proven implementation based on a surface charge transfer acquisition principle.

The touch sensing controller is fully supported by the STMTouch touch sensing firmware library (free to use) and enables reliable touch sensing functionality in the end application.

38/121 DS13258 Rev 1

STM32WB15CC Functional overview

The main features of the touch sensing controller are the following:

 Proven and robust surface charge transfer acquisition principle

 Supports up to three capacitive sensing channels

 Up to eight capacitive sensing channels can be acquired in parallel offering a very good

response time

 Spread spectrum feature to improve system robustness in noisy environments

 Full hardware management of the charge transfer acquisition sequence

 Programmable charge transfer frequency

 Programmable sampling capacitor I/O pin

 Programmable channel I/O pin

 Programmable max count value to avoid long acquisition when a channel is faulty

 Dedicated end of acquisition and max count error flags with interrupt capability

 One sampling capacitor for up to three capacitive sensing channels to reduce the

system components

 Compatible with proximity, touchkey, linear and rotary touch sensor implementation

 Designed to operate with STMTouch touch sensing firmware library

Note: The number of capacitive sensing channels is dependent upon the package and subject to

I/O availability.

3.17 True random number generator (RNG)

The device embeds a true RNG that delivers 32-bit random numbers generated by an integrated analog circuit.

3.18 Timers and watchdogs

The STM32WB15CC includes one advanced 16-bit timer, one general-purpose 32-bit timer, two low-power timers, two watchdog timers and a SysTick timer. features of the advanced control, general purpose and basic timers.

Timer

type

Advanced

control

General purpose

Low power

Timer

TIM1 16-bits

TIM2 32-bits

LPTIM1 LPTIM2

Counter

resolution

16-bits Up 1 1

Table 12. Timer features

Counter

type

Up, down,

Up/down

Up, down,

Up/down

Prescaler

factor

Any integer

between 1

and 65536

generation

DMA

request

Yes

Table 12 compares the

Capture/ compare channels

4No

Complementary

outputs

3.18.1 Advanced-control timer (TIM1)

The advanced-control timer can be seen as a three-phase PWM multiplexed on six channels. They have complementary PWM outputs with programmable inserted

DS13258 Rev 1 39/121



Functional overview STM32WB15CC

dead-times. They can also be seen as complete general-purpose timers. The four independent channels can be used for:

 Input capture

 Output compare

 PWM generation (edge or center-aligned modes) with full modulation capability (0 to

100%)

 One-pulse mode output

In debug mode, the advanced-control timer counter can be frozen and the PWM outputs disabled to turn off any power switches driven by these outputs.

Many features are shared with those of the general-purpose TIMx timers (described in

Section 3.18.2) using the same architecture, so the advanced-control timers can work

together with the TIMx timers via the Timer Link feature for synchronization or event chaining.

3.18.2 General-purpose timer (TIM2)

There is one synchronizable general-purpose timer embedded in the STM32WB15CC (see

Tab l e 12), it can be used to generate PWM outputs, or act as a simple time base.

 TIM2

– Full-featured general-purpose timer

– Features four independent channels for input capture/output compare, PWM or

one-pulse mode output. Can work together, or with the other general-purpose timers via the Timer Link feature for synchronization or event chaining.

– The counter can be frozen in debug mode.

– Independent DMA request generation, support of quadrature encoders.

3.18.3 Low-power timer (LPTIM1 and LPTIM2)

The device embeds two low-power timers, having an independent clock running in Stop mode if they are clocked by LSE, LSIx or by an external clock. They are able to wakeup the system from Stop mode.

LPTIM1 is active in Stop 0 and Stop 1 modes.

LPTIM2 is active in Stop 0 and Stop 1 modes.

The low-power timers support the following features:

 16-bit up counter with 16-bit autoreload register

 16-bit compare register

 Configurable output: pulse, PWM

 Continuous/ one shot mode

 Selectable software/hardware input trigger

 Selectable clock source

– Internal clock sources: LSE, either LSI1 or LSI2, HSI16 or APB clock

– External clock source over LPTIM input (working even with no internal clock

source running, used by pulse counter application)

 Programmable digital glitch filter

 Encoder mode (LPTIM1 only)

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STM32WB15CC Functional overview

3.18.4 Independent watchdog (IWDG)

The independent watchdog is based on a 12-bit downcounter and an 8-bit prescaler. It is clocked from an independent 32 from the main clock, it can operate in Stop and Standby modes. It can be used either as a watchdog to reset the device when a problem occurs, or as a free running timer for application timeout management. It is hardware or software configurable through the option bytes. The counter can be frozen in debug mode.

kHz internal RC (LSI) and as it operates independently

3.18.5 System window watchdog (WWDG)

The window watchdog is based on a 7-bit downcounter that can be set as free running. It can be used as a watchdog to reset the device when a problem occurs. It is clocked from the main clock. It has an early warning interrupt capability and the counter can be frozen in debug mode.

3.18.6 SysTick timer

This timer is dedicated to real-time operating systems, but could also be used as a standard down counter. It features:

 a 24-bit down counter

 autoreload capability

 a maskable system interrupt generation when the counter reaches 0

 a programmable clock source.

3.19 Real-time clock (RTC) and backup registers

The RTC is an independent BCD timer/counter, supporting the following features:

 Calendar with subsecond, seconds, minutes, hours (12 or 24 format), week day, date,

month, year, in BCD (binary-coded decimal) format.

 Automatic correction for 28, 29 (leap year), 30, and 31 days of the month.

 Two programmable alarms.

 On-the-fly correction from 1 to 32767 RTC clock pulses. This can be used to

synchronize it with a master clock.

 Reference clock detection: a more precise second source clock (50 or 60 Hz) can be

used to enhance the calendar precision.

 Digital calibration circuit with 0.95 ppm resolution, to compensate for quartz crystal

inaccuracy.

 One anti-tamper detection pin with programmable filter.

 Timestamp feature, which can be used to save the calendar content. This function can

be triggered by an event on the timestamp pin, or by a tamper event, or by a switch to VBAT mode.

 17-bit auto-reload wakeup timer (WUT) for periodic events with programmable

resolution and period.

The RTC and the 20 backup registers are supplied through a switch that takes power either from the V

supply (when present) or from the VBAT pin.

DS13258 Rev 1 41/121

Functional overview STM32WB15CC

The backup registers are 32-bit registers used to store 80 bytes of user application data when V

power is not present. They are not reset by a system or power reset, or when the

device wakes up from Standby or Shutdown mode.

The RTC clock sources can be:

 a 32.768 kHz external crystal (LSE)

 an external resonator or oscillator (LSE)

 one of the internal low power RC oscillators (LSI1 with typical frequency of 32 kHz or

LSI2)

 the high-speed external clock (HSE) divided by 32.

The RTC is functional in VBAT mode and in all low-power modes when it is clocked by the LSE. When clocked by one of the LSIs, the RTC is not functional in VBAT mode, but is functional in all low-power modes except Shutdown mode.

All RTC events (alarm, wakeup timer, timestamp or tamper) can generate an interrupt and wakeup the device from the low-power modes.

3.20 Inter-integrated circuit interface (I2C)

The device embeds one I2C. Refer to Tab le 13 for the features implementation.

The I2C bus interface handles communications between the microcontroller and the serial

C bus. It controls all I2C bus-specific sequencing, protocol, arbitration and timing.

The I2C peripheral supports:

 I2C-bus specification and user manual rev. 5 compatibility:

– Slave and master modes, multimaster capability

– Standard-mode (Sm), with a bitrate up to 100 kbit/s

– Fast-mode (Fm), with a bitrate up to 400 kbit/s

– Fast-mode Plus (Fm+), with a bitrate up to 1 Mbit/s and 20 mA output drive I/Os

– 7-bit and 10-bit addressing mode, multiple 7-bit slave addresses

– Programmable setup and hold times

– Optional clock stretching

 System Management Bus (SMBus) specification rev 2.0 compatibility:

– Hardware PEC (packet error checking) generation and verification with ACK

control

– Address resolution protocol (ARP) support

– SMBus alert

 Power System Management Protocol (PMBus

™

) specification rev 1.1 compatibility

 Independent clock: a choice of independent clock sources allowing the I2C

communication speed to be independent from the PCLK reprogramming. Refer to

Figure 7: Clock tree.

 Wakeup from Stop mode on address match

 Programmable analog and digital noise filters

 1-byte buffer with DMA capability

42/121 DS13258 Rev 1

STM32WB15CC Functional overview

Standard-mode (up to 100 kbit/s) X

Fast-mode (up to 400 kbit/s) X

Fast-mode Plus with 20mA output drive I/Os (up to 1 Mbit/s) X

Programmable analog and digital noise filters X

SMBus/PMBus hardware support X

Independent clock X

Wakeup from Stop 0 / Stop 1 mode on address match X

1. X: supported.

Table 13. I2C implementation

I2C features

(1)

I2C1

3.21 Universal synchronous/asynchronous receiver transmitter (USART)

The device embeds one universal synchronous receiver transmitter.

This interface provides asynchronous communication, IrDA SIR ENDEC support, multiprocessor communication mode, single-wire half-duplex communication mode and has LIN Master/Slave capability. It provides hardware management of the CTS and RTS signals, and RS485 driver enable.

The USART is able to communicate at speeds of up to 4 Mbit/s, and also provides Smart Card mode (ISO 7816 compliant) and SPI-like communication capability.

The USART supports synchronous operation (SPI mode), and can be used as an SPI master.

The USART has a clock domain independent from the CPU clock, allowing it to wake up the MCU from Stop mode using baudrates up to 200

kbaud. The wake up events from Stop

mode are programmable and can be:

 the start bit detection

 any received data frame

 a specific programmed data frame.

The USART interface can be served by the DMA controller.

3.22 Low-power universal asynchronous receiver transmitter (LPUART)

The device embeds one Low-Power UART, enabling asynchronous serial communication with minimum power consumption. The LPUART supports half duplex single wire communication and modem operations (CTS/RTS), allowing multiprocessor communication.

DS13258 Rev 1 43/121

Functional overview STM32WB15CC

The LPUART has a clock domain independent from the CPU clock, and can wakeup the system from Stop mode using baudrates up to 220 mode are programmable and can be:

 the start bit detection

 any received data frame

 a specific programmed data frame.

Only a 32.768 kHz clock (LSE) is needed for LPUART communication up to 9600 baud. Therefore, even in Stop mode, the LPUART can wait for an incoming frame while having an extremely low energy consumption. Higher speed clock can be used to reach higher baudrates.

The LPUART interfaces can be served by the DMA controller.

kbaud. The wake up events from Stop

3.23 Serial peripheral interface (SPI1)

The SPI interface enables communication up to 32 Mbit/s in master and up to 24 Mbit/s in slave modes, in half-duplex, full-duplex and simplex modes. The 3-bit prescaler gives 8 master mode frequencies and the frame size is configurable from 4 bits to 16 bits. The SPI interface support NSS pulse mode, TI mode and Hardware CRC calculation.

The SPI interface can be served by the DMA controller.

3.24 Development support

3.24.1 Serial wire JTAG debug port (SWJ-DP)

The Arm® SWJ-DP interface is embedded, and is a combined JTAG and serial wire debug port that enables either a serial wire debug or a JTAG probe to be connected to the target.

Debug is performed using only two pins instead of the five required by the JTAG (JTAG pins can then be reused as GPIOs with alternate function): the JTAG TMS and TCK pins are shared with SWDIO and SWCLK, respectively, and a specific sequence on the TMS pin is used to switch between JTAG-DP and SW-DP.

44/121 DS13258 Rev 1

STM32WB15CC Pinouts and pin description

MS53545V1

UFQFPN48

VBAT

PC14-OSC32_IN

PC15-OSC32_OUT

PH3-BOOT0

PB8

PB9

NRST

VDDA

PA0

PA1

PA2

PA3

393740

484746

222421

131415

PA4

PA5

PA8

VDD

OSC_OUT

PA6

PA7

RF1

PA9

PB2

VSSRF

VDDRF

PA10

VDD

VDDSMPS

VLXSMPS

VSSSMPS

VFBSMPS

PE4

PB1

PB0

AT1

AT0

OSC_IN

VDD

PB7

PB4

PA14

PA11

PB6

PB5

VDD

PB3

PA15

PA13

PA12

MS53559V1

UFQFPN48E

PC14-OSC32_IN

PC15-OSC32_OUT

PB10

PH3-BOOT0

PB8

PB9

PB11-NRST

VDDA

PA0

PA1

PA2

PA3

393740

484746

222421

131415

PB12

PA4

PA7

PB2

OSC_OUT

PA5

PA6

VDD

PA8

PA9

RF1

VDDRF

PA10

PB15

PB14

VDD

PE4

PB13

PB1

PB0

AT1

AT0

OSC_IN

VDD

PB7

PB4

PA14

PA11

PB6

PB5

PC1

PB3

PA15

PA13

PA12

4 Pinouts and pin description

Figure 8. STM32WB15CCU UFQFPN48 pinout

1. The above figure shows the package top view.

2. The exposed pad must be connected to ground plane.

Figure 9. STM32WB15CCU UFQFPN48E pinout

(1) (2)

1. The above figure shows the package top view.

2. The exposed pad must be connected to ground plane.

DS13258 Rev 1 45/121

Pinouts and pin description STM32WB15CC

Table 14. Legend/abbreviations used in the pinout table

Name Abbreviation Definition

Pin name

Pin type

I/O structure

Notes Unless otherwise specified by a note, all I/Os are set as analog inputs during and after reset.

Unless otherwise specified in brackets below the pin name, the pin function during and after reset is the same as the actual pin name

S Supply pin

I Input only pin

I/O Input / output pin

FT 5 V tolerant I/O

TT 3.6 V tolerant I/O

RF RF I/O

RST Bidirectional reset pin with weak pull-up resistor

Option for TT or FT I/Os

(2) (3)

(1)

I/O, Fm+ capable

I/O, with analog switch function supplied by V

DDA

Alternate

functions

Additional

functions

1. The related I/O structures in Table 15 are FT_f and FT_fa.

2. The related I/O structures in Table 15 are FT_a, FT_la, FT_fa and TT_a.

3. The analog switch for the TSC function is supplied by V

Functions selected through GPIOx_AFR registers

Functions directly selected/enabled through peripheral registers

46/121 DS13258 Rev 1

STM32WB15CC Pinouts and pin description

Table 15. STM32WB15CC pin definitions

Number

UFQFPN48

after reset)

UFQFPN48E

Name

(function

Type

Notes

I/O structures

Alternate functions Additional functions

1 - VBAT S - - - -

PC14-

OSC32_IN

PC15-

OSC32_OUT

I/O FT

(1)

CM4_EVENTOUT OSC32_IN

(1)

CM4_EVENTOUT OSC32_OUT

- 3 PB10 I/O FT - TSC_G3_IO2, CM4_EVENTOUT -

(2)

4 4 PH3-BOOT0 I/O FT - LSCO

5 5 PB8 I/O FT_f -

6 6 PB9 I/O FT_f -

TIM1_CH2N, I2C1_SCL, TSC_G7_IO3, CM4_EVENTOUT

TIM1_CH3N, I2C1_SDA, TSC_G7_IO4, CM4_EVENTOUT

, CM4_EVENTOUT -

7 7 NRST(PB11) I/O FT - - -

8 8 VDDA S - - - -

99 PA0 I/OFT_a-

10 10 PA1 I/O FT_a -

11 11 PA2 I/ O F T_a -

12 12 PA3 I/O FT_a -

- 13 PB12 I/O FT -

13 14 PA4 I/O FT_a -

14 15 PA5 I/O FT_a -

15 16 PA6 I/O FT_a -

16 17 PA7 I/O FT_a -

17 18 PA8 I/O FT_a -

TIM2_CH1, COMP1_OUT, TIM2_ETR, CM4_EVENTOUT

TIM2_CH2, I2C1_SMBA, SPI1_SCK, CM4_EVENTOUT

(2)

LSCO

, TIM2_CH3, LPUART1_TX,

CM4_EVENTOUT

TIM2_CH4, LPUART1_RX, CM4_EVENTOUT

TIM2_CH2, TSC_G1_IO1, CM4_EVENTOUT

SPI1_NSS(boot), LPTIM2_OUT, CM4_EVENTOUT

TIM2_CH1, TIM2_ETR, SPI1_MOSI, SPI1_SCK(boot), LPTIM2_ETR, CM4_EVENTOUT

TIM1_BKIN, SPI1_MISO(boot), LPUART1_CTS, CM4_EVENTOUT

TIM1_CH1N, SPI1_MOSI(boot), CM4_EVENTOUT

MCO, TIM1_CH1, USART1_CK, LPTIM2_OUT, CM4_EVENTOUT

COMP1_INM, ADC1_IN5, RTC_TAMP2/WKUP1

COMP1_INP, ADC1_IN6

ADC1_IN7, WKUP4

ADC1_IN8

COMP1_INM, ADC1_IN9

COMP1_INM, ADC1_IN10

ADC1_IN11

ADC1_IN2

ADC1_IN3

DS13258 Rev 1 47/121

Pinouts and pin description STM32WB15CC

Table 15. STM32WB15CC pin definitions (continued)

Number

Name

UFQFPN48

UFQFPN48E

(function

after reset)

Type

I/O structures

18 19 PA9 I/O FT_fa -

19 20 PB2 I/O FT_a -

Notes

TIM1_CH2, I2C1_SCL, USART1_TX(boot), CM4_EVENTOUT

RTC_OUT, LPTIM1_OUT, SPI1_NSS, CM4_EVENTOUT

Alternate functions Additional functions

COMP1_INM, ADC1_IN4

COMP1_INP

20 21 VDD S - - - -

(3)

21 22 RF1 I/O RF

-- -

22 - VSSRF S - - - -

23 23 VDDRF S - - - -

24 24 OSC_OUT O RF

(4)

25 25 OSC_IN I RF - - -

26 26 AT0 I/O RF

27 27 AT1 I/O RF

28 28 PB0 I/O TT

29 29 PB1 I/O TT

- 30 PB13 I/O FT -

(5)

RF_TX_MOD_EXT_PA, COMP1_OUT,

(6)

CM4_EVENTOUT

LPUART1_RTS_DE, LPTIM2_IN1,

(6)

CM4_EVENTOUT

TIM2_CH3, TSC_G1_IO2, CM4_EVENTOUT

30 31 PE4 I/O FT - CM4_EVENTOUT -

31 - VFBSMPS S - - - -

32 - VSSSMPS S - - - -

33 - VLXSMPS S - - - -

34 - VDDSMPS S - - - -

35 - VDD S - - - -

32 VDD S - - - -

33 VDD S - - - -

- 34 PB14 I/O FT - TIM1_CH1, CM4_EVENTOUT -

- 35 PB15 I/O FT - TIM2_CH1, CM4_EVENTOUT -

36 36 PA10 I/O FT_f -

37 37 PA11 I/O FT -

TIM1_CH3, I2C1_SDA, USART1_RX(boot), TSC_G7_IO2, CM4_EVENTOUT

TIM1_CH4, TIM1_BKIN2, SPI1_MISO, USART1_CTS, CM4_EVENTOUT

48/121 DS13258 Rev 1

STM32WB15CC Pinouts and pin description

Table 15. STM32WB15CC pin definitions (continued)

Number

Name

UFQFPN48

UFQFPN48E

(function

after reset)

Type

I/O structures

38 38 PA12 I/O FT -

39 39 PA13 I/O FT

Notes

TIM1_ETR, SPI1_MOSI, USART1_RTS, LPUART1_RX, CM4_EVENTOUT

JTMS-SWDIO, SPI1_MOSI, TSC_G7_IO1,

(7)

CM4_EVENTOUT

Alternate functions Additional functions

40 - VDD S - - - -

- 40 PC1 I/O FT - TSC_G3_IO3, CM4_EVENTOUT -

41 41 PA14 I/O FT

42 42 PA15 I/O FT

(7)

SPI1_NSS, CM4_EVENTOUT

JTDI, TIM2_CH1, TIM2_ETR, SPI1_NSS,

(7)

MCO, TSC_G3_IO1, CM4_EVENTOUT

JTCK-SWCLK, LPTIM1_OUT, I2C1_SMBA,

JTDO-TRACESWO, TIM2_CH2,

43 43 PB3 I/O FT -

SPI1_SCK, USART1_RTS,

CM4_EVENTOUT

NJTRST, SPI1_MISO, USART1_CTS,

44 44 PB4 I/O FT

45 45 PB5

(8)

I/O FT -

(7)

TSC_G2_IO1, CM4_EVENTOUT

LPTIM1_IN1, I2C1_SMBA, SPI1_MOSI, USART1_CK, LPUART1_TX,

TSC_G2_IO2, CM4_EVENTOUT

MCO, LPTIM1_ETR, I2C1_SCL(boot),

46 46 PB6 I/O FT_f -

SPI1_NSS, USART1_TX, TSC_G2_IO3,

CM4_EVENTOUT

LPTIM1_IN2, TIM1_BKIN, I2C1_SDA(boot),

47 47 PB7 I/O FT_f -

USART1_RX, TSC_G2_IO4, TIM1_CH3,

PVD_IN

CM4_EVENTOUT

48 48 VDD S - - - -

1. PC14 and PC15 are supplied through the power switch. As this switch only sinks a limited current (3 mA), the use of PC14

and PC15 GPIOs in output mode is limited:

- the speed must not exceed 2 MHz with a maximum load of 30 pF

- these GPIOs must not be used as current sources (e.g. to drive an LED). After a Backup domain power-up PC14 and PC15 operate as GPIOs. Their function depends on the content of the RTC registers not reset by the system reset. For details on how to manage these GPIOs, refer to the Backup domain and RTC register description in RM0473, available on www.st.com.

2. The clock on LSCO is available in Run and Stop modes, and on PA2 in Standby and Shutdown modes.

3. RF pin, use the nominal PCB layout.

4. 32 MHz oscillator pins, use the nominal PCB layout according to reference design (see AN5165 available on www.st.com).

5. Reserved for production, must be kept unconnected.

6. High frequency (above 32 KHz) may impact RF performance. Set output speed GPIOB_OSPEEDRy[1:0] to 00 (y = 0 and

1) during RF operation.

7. After reset, this pin is configured as JTAG/SW debug alternate function, and the internal pull-up on PA15, PA13 and PB4

pins and the internal pull-down on PA14 pin are activated.

DS13258 Rev 1 49/121

Pinouts and pin description STM32WB15CC

8. PB5 pin is configured as input with pull up active under reset if NRST pin is active (external or internal reset).

50/121 DS13258 Rev 1

Port

Table 16. Alternate functions

AF0 AF1 AF2 AF3 AF4 AF5 AF6 AF7 AF8 AF9 AF12 AF14 AF15

SYS_AF

LPTIM1/

TIM1/2

TIM1/2 TIM1

I2C1/ SPI1

SPI1

RF/

SYS_AF

USART1 LPUART1 TSC

COMP1/

TIM1

LPTIM2/

TIM2

STM32WB15CC Pinouts and pin description

EVENTOUT

DS13258 Rev 1 51/121

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

LSCO

- - - - SPI1_NSS - - - - -

PA8

PA9

PA1 0

PA11

PA1 2

PA1 3

PA1 4

PA1 5

MCO

JTMS-

SWDIO

JTCK-

SWCLK

JTDI

TIM2_

CH1

TIM2_

CH2

TIM2_

CH3

TIM2_

CH4

TIM2_

CH1

TIM1_

BKIN

TIM1_ CH1N

TIM1_

CH1

TIM1_

CH2

TIM1_

CH3

TIM1_

CH4

TIM1_

ETR

- - - - SPI1_MOSI - - -

LPTIM1_

OUT

TIM2_

CH1

-- - - - - - -

-- - - - -

TIM2_

ETR

- - SPI1_MISO - -

- - - SPI1_MOSI - - - - - -

-- - - -

TIM1_ BKIN2

- - - SPI1_MOSI -

TIM2_

ETR

- SPI1_MOSI SPI1_SCK - - - - -

- - SPI1_MISO -

- SPI1_NSS MCO - -

I2C1_ SMBA

I2C1_

SCL

I2C1_

SDA

I2C1_ SMBA

SPI1_SCK - - - - - -

USART1_

SPI1_NSS - - - - - -

USART1_

CTS

USART1_

RTS

LPUART1_

CTS

---

--- -

LPUART1_

TSC_

G7_IO2

TSC_

G7_IO1

TSC_

G3_IO1

COMP1_

OUT

-- -

TIM2_

ETR

LPTIM2_

OUT

LPTIM2_

ETR

LPTIM2_

OUT

EVENTOUT

CM4_

52/121 DS13258 Rev 1

Port

Table 16. Alternate functions (continued)

AF0 AF1 AF2 AF3 AF4 AF5 AF6 AF7 AF8 AF9 AF12 AF14 AF15

SYS_AF

LPTIM1/

TIM1/2

TIM1/2 TIM1

I2C1/ SPI1

SPI1

RF/

SYS_AF

USART1 LPUART1 TSC

COMP1/

TIM1

LPTIM2/

TIM2

EVENTOUT

Pinouts and pin description STM32WB15CC

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10

PB12

PB13

PB14

PB15

---- - -

---- - - - -

RTC_

OUT

JTDO-

TRACE

SWO

NJTRST - - - - SPI1_MISO -

MCO

LPTIM1_

OUT

TIM2_

CH2

LPTIM1_

IN1

LPTIM1_

ETR

LPTIM1_

IN2

TIM1_ CH2N

TIM1_ CH3N

TIM2_

CH2

TIM2_

CH3

TIM1_

CH1

TIM2_

CH1

- - - SPI1_NSS - - - - - -

- - - SPI1_SCK -

- TIM1_BKIN

-- - - - - -

-- - - - - - -- -

I2C1_ SMBA

I2C1_

SCL

I2C1_

SDA

I2C1_

SCL

I2C1_

SDA

SPI1_MOSI -

SPI1_NSS -

----

RF_TX_

MOD_EXT_PA

---

LPUART1_

RTS_DE

USART1_

RTS_

USART1_

CTS

USART1_CKLPUART1_TXTSC_

USART1_

--- -

TSC_

G2_IO1

G2_IO2

TSC_

G2_IO3

TSC_

G2_IO4

TSC_

G7_IO3

TSC_

G7_IO4

TSC_

G3_IO2

TSC_

G1_IO1

TSC_

G1_IO2

COMP1_

OUT

TIM1_CH3 -

LPTIM2_

IN1

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

Port

Table 16. Alternate functions (continued)

AF0 AF1 AF2 AF3 AF4 AF5 AF6 AF7 AF8 AF9 AF12 AF14 AF15

SYS_AF

LPTIM1/

TIM1/2

TIM1/2 TIM1

I2C1/ SPI1

SPI1

RF/

SYS_AF

USART1 LPUART1 TSC

COMP1/

TIM1

LPTIM2/

TIM2

EVENTOUT

STM32WB15CC Pinouts and pin description

DS13258 Rev 1 53/121

PC1

PC14

PC15

PE4

PH3

---- - - - --

---- - - - -----

LSCO - - - - - - - - - - -

TSC_G3

_IO3

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

CM4_

EVENTOUT

Memory mapping STM32WB15CC

5 Memory mapping

The STM32WB15CC devices feature a single physical address space that can be accessed by the application processor and by the RF subsystem.

A part of the Flash memory and of the SRAM2a and SRAM2b memories are made secure, exclusively accessible by the CPU2, protected against execution, read and write from CPU1 and DMA.

In case of shared resources the SW has to implement arbitration mechanism to avoid access conflicts. This happens for peripherals Reset and clock controller (RCC), Power controller (PWC), EXTI and Flash interface, and can be implemented using the built-in semaphore block (HSEM).

By default the RF subsystem and CPU2 operate in secure mode. This implies that part of the Flash and of the SRAM2 memories can only be accessed by the RF subsystem and by the CPU2. In this case the Host processor (CPU1) has no access to these resources.

The detailed memory map and the peripheral mapping of the STM32WB15CC devices can be found in the reference manual RM0473.

54/121 DS13258 Rev 1

STM32WB15CC Electrical characteristics

MS19210V1

MCU pin

C = 50 pF

MS19211V1

MCU pin

6 Electrical characteristics

6.1 Parameter conditions

Unless otherwise specified, all voltages are referenced to VSS.

6.1.1 Minimum and maximum values

Unless otherwise specified, the minimum and maximum values are guaranteed in the worst conditions of ambient temperature, supply voltage and frequencies by tests in production on 100% of the devices with an ambient temperature at T the selected temperature range).

Data based on characterization results, design simulation and/or technology characteristics are indicated in the table footnotes and are not tested in production. Based on characterization, the minimum and maximum values refer to sample tests and represent the mean value plus or minus three times the standard deviation (mean ± 3).

6.1.2 Typical values

= 25 °C and TA = TAmax (given by

Unless otherwise specified, typical data are based on VDD = V T

= 25 °C. They are given only as design guidelines and are not tested.

Typical ADC accuracy values are determined by characterization of a batch of samples from a standard diffusion lot over the full temperature range, where 95% of the devices have an error less than or equal to the value indicated

6.1.3 Typical curves

Unless otherwise specified, all typical curves are given only as design guidelines and are not tested.

6.1.4 Loading capacitor

The loading conditions used for pin parameter measurement are shown in Figure 10.

6.1.5 Pin input voltage

The input voltage measurement on a pin of the device is described in Figure 11.

Figure 10. Pin loading conditions Figure 11. Pin input voltage

(mean ± 2).

DDA

= V

DDRF

= 3 V,

DS13258 Rev 1 55/121

113

Electrical characteristics STM32WB15CC

MS53546V2

Backup circuitry

(LSE, RTC and

backup registers)

Kernel logic

(CPU, digital

and memories

Level shifter

logic

OUT

Regulator

GPIOs

1.55 V to 3.6 V

n x 100 nF

+ 1 x 4.7 μF

n x VDD

VBAT

CORE

Power switch

DDIO1

ADC

COMPs

DDA

10 nF + 1 μF

VDDA

SMPS

Regulator

VDDSMPS

VLXSMPS

VFBSMPS

VSSSMPS

4.7 μF

(1)

Exposed pad

4.7 μF

To all modules

SMPS

Radio

100 nF

+ 100 pF

VDDRF

REF-

REF+

6.1.6 Power supply scheme

Figure 12. Power supply scheme

Caution: Each power supply pair (e.g. VDD / VSS, V

56/121 DS13258 Rev 1

1. The value of L1 depends upon the frequency, as indicated in Table 5: Power supply typical components.

ceramic capacitors as shown in Figure 12. These capacitors must be placed as close as possible to (or below) the appropriate pins on the underside of the PCB to ensure the good functionality of the device.

DDA

/ V

) must be decoupled with filtering

SSA

STM32WB15CC Electrical characteristics

MS53547V1

DDVBAT

BAT

DDA

DDRF

DDSMPS

6.1.7 Current consumption measurement

Figure 13. Current consumption measurement scheme

6.2 Absolute maximum ratings

Stresses above the absolute maximum ratings listed in Tab le 17, Table 18 and Tab l e 19 may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these conditions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

Device mission profile (application conditions) is compliant with JEDEC JESD47 Qualification standard, extended mission profiles are available on demand.

Table 17. Voltage characteristics

Symbol Ratings Min Max Unit

External main supply voltage

- V

DDX

|V

SSx-VSS

(including V

DDRF

Input voltage on FT_xxx pins

(2)

Input voltage on TT pins 4.0

Input voltage on any other pin 4.0

Variations between different V

DDx

power pins of the same domain

Variations between all the different

ground pins

DSMPS

, V

DDA

BAT

)

DDX

-0.3 4.0

min (V

- 0.3

-50

, V

(1)

DDA

, V

DDRF

, V

DDSMPS

) +

4.0

(3)(4)

1. All main power (VDD, V

power supply, in the permitted range.

maximum must always be respected. Refer to Table 18 for the maximum allowed injected current values.

2. V

DDRF

, V

DDA

, V

DDSMPS

, V

) and ground (VSS, V

BAT

) pins must always be connected to the external

SSA

DS13258 Rev 1 57/121

113

Electrical characteristics STM32WB15CC

3. This formula has to be applied only on the power supplies related to the IO structure described in the pin definition table.

4. To sustain a voltage higher than 4 V the internal pull-up/pull-down resistors must be disabled.

Table 18. Current characteristics

Symbol Ratings Max Unit

(1)

130

100

IV

DD(PIN)

SS(PIN)

Total current into sum of all V

Total current out of sum of all V

Maximum current into each V

Maximum current out of each V

power lines (source)

ground lines (sink)

power pin (source)

ground pin (sink)

Output current sunk by any I/O and control pin except FT_f 20

IO(PIN)

Output current sunk by any FT_f pin 20

Output current sourced by any I/O and control pin 20

I

Total output current sunk by sum of all I/Os and control pins

IO(PIN)

INJ(PIN)

|I

INJ(PIN)

1. All main power (VDD, V

power supplies, in the permitted range.

2. This current consumption must be correctly distributed over all I/Os and control pins. The total output current must not be

sunk/sourced between two consecutive power supply pins referring to high pin count packages.

3. Positive injection (when V

specified maximum value.

4. A negative injection is induced by V

characteristics for the maximum allowed input voltage values.

5. When several inputs are submitted to a current injection, the maximum |I

injected currents (instantaneous values).

Total output current sourced by sum of all I/Os and control pins

Injected current on FT_xxx, TT and RST pins, except PB0 and PB1 –5 / +0

(3)

Injected current on PB0 and PB1 -5/0

Total injected current (sum of all I/Os and control pins)

, V

DDRF

, V

DDA

> VDD) is not possible on these I/Os and does not occur for input voltages lower than the

DDSMPS

< VSS. I

, V

) and ground (VSS, V

BAT

must never be exceeded. Refer also to Table 17: Voltage

INJ(PIN)

SSA

(2)

(5)

) pins must always be connected to the external

is the absolute sum of the negative

INJ(PIN)

100

(4)

Table 19. Thermal characteristics

Symbol Ratings Value Unit

STG

Storage temperature range –65 to +150

Maximum junction temperature 130

58/121 DS13258 Rev 1

°C

STM32WB15CC Electrical characteristics

6.3 Operating conditions

6.3.1 Summary of main performance

CORE

PERI

Table 20. Main performance at VDD = 3.3 V

Parameter Test conditions Typ Unit

Core current consumption

VBAT (V

Standby (V

Shutdown (V

= 1.8 V, VDD = 0 V) 0.001

BAT

= 1.8 V) 0.012

= 1.8 V, 48 Kbytes RAM retention) 0.33

Sleep (16 MHz) 0.610

LP run (2 MHz) 190

Run (64 MHz) 4550

(1)

(2)

with Stop 1

(2)

with Stop 1

(2)

with Standby

(2)

with Standby

(1)

4500

5200

TBD

Peripheral current consumption

Radio RX

Radio TX 0 dBm output power

Advertising

(Tx = 0 dBm; period 1.28 s; 31 bytes, 3 channels)

Advertising

(Tx = 0 dBm, 6 bytes; period 10.24 s, 3 channels)

BLE

Advertising

(Tx = 0 dBm; period 1.28 s; 31 bytes, 3 channels)

Advertising

(Tx = 0 dBm, 6 bytes; period 10.24 s, 3 channels)

LP timers - 5.8

µA

LPUART - 8.1

RTC - 1.75

1. Power consumption including RF subsystem and digital processing.

2. Power consumption integrated over 100 s including Cortex-M4, RF subsystem, digital processing and Cortex M0+.

6.3.2 General operating conditions

Symbol Parameter Conditions Min Max Unit

HCLK

PCLK1

PCLK2

Internal AHB clock frequency -

Internal APB1 clock frequency -

Internal APB2 clock frequency -

Table 21. General operating conditions

064MHzf

DS13258 Rev 1 59/121

113

Electrical characteristics STM32WB15CC

Table 21. General operating conditions (continued)

Symbol Parameter Conditions Min Max Unit

Standard operating voltage -

1.71

(1) (2)

ADC or COMP used 1.62

FBSMPS

DDRF

Analog supply voltage

DDA

Backup operating voltage - 1.55

BAT

ADC, COMP not used 0

SMPS feedback voltage - 1.4

Minimum RF voltage - 1.71

TT_xx I/O –0.3 V

I/O input voltage

All I/O except TT_xx –0.3

min (min (V

3.6 V, 5.5 V)

3.6

+ 0.3

, V

DDA

(3)(4)

) +

Power dissipation at

= 85 °C for suffix 6 version, or

= 105 °C for suffix 7 version

Ambient temperature for  suffix 6 version

UFQFPN48 - 722 mW

Maximum power dissipation

Low-power dissipation

(5)

–40

105

Ambient temperature for suffix 7 version

Maximum power dissipation

Low-power dissipation

(5)

-40

Suffix 6 version

Junction temperature range

1. When RESET is released functionality is guaranteed down to V

2. When V mode, or the SMPS is not enabled.

3. This formula has to be applied only on the power supplies related to the IO structure described by the pin definition table. Maximum I/O input voltage is the smallest value between min (V

4. For operation with voltage higher than min (V disabled.

5. In low-power dissipation state, T

Thermal characteristics).

is lower then 1.95 V, the SMPS operation mode is enabled by the BORH configuration to force SMPS bypass

DDmin

can be extended to this range as long as TJ does not exceed TJmax (see Section 7.2:

Suffix 7 version 125

Min.

BOR0

, V

) + 3.6 V and 5.5 V.

DDA

, V

) + 0.3 V, the internal pull-up and pull-down resistors must be

DDA

-40

105

125

105

°C

6.3.3 RF BLE characteristics

RF characteristics are given at 1 Mbps, unless otherwise specified.

Symbol Parameter Test conditions Min Typ Max Unit

xtal

Frequency operating range - 2402 - 2480

Crystal frequency

F Delta frequency

Rgfsk On air data rate

PLLres RF channel spacing

60/121 DS13258 Rev 1

Table 22. RF transmitter BLE characteristics

--32-

--250-

--12

--2-

MHz

kHz

Mbps

MHz

STM32WB15CC Electrical characteristics

Table 23. RF transmitter BLE characteristics (1 Mbps)

(1)

Symbol Parameter Test conditions Min Typ Max Unit

SMPS Bypass or ON

Maximum output power

0 dBm output power

Minimum output power

band

Output power variation over the band

BWdB 6 dB signal bandwidth

IBSE In band spurious emission

Frequency drift

maxdr Maximum drift rate

fo Frequency offset

f1 Frequency deviation average

(V VDD > 1.95 V)

SMPS Bypass or ON (V VDD > 1.71 V), Code 29

Tx = 0 dBm - Typical -0.5 - 0.4 dB

Tx = max output power - 670 - kHz

2 MHz Bluetooth

 3 MHz Bluetooth

Bluetooth® Low Energy: ±50 kHz -50 - +50 kHz

Bluetooth ±20 kHz / 50 µs

Bluetooth ±150 kHz

Bluetooth between 225 and 275 kHz

FBSMPS

= 1.7 V and

(2)

= 1.4 V and

(2)

-5.5-

-3.6-

--0-

---20-

Low Energy:-20 dBm - -50 -

Low Energy: -30 dBm - -53 -

Low Energy:

Low Energy: 

-20 - +20

-150 - +150

225 - 275

dBm

kHz/

50 µs

kHz

fa

OBSE

1. Measured in conducted mode, based on reference design (see AN5165), using output power specific external RF filter and

impedance matching networks to interface with a 50  antenna.

2. V SMPS on STM32WB Series microcontrollers, available on www.st.com).

3. Suitable for systems targeting compliance with worldwide radio-frequency regulations ETSI EN 300 328 and EN 300 440 Class 2 (Europe), FCC CFR47 Part 15 (US), and ARIB STD-T66 (Japan).

Frequency deviation f2 (average) / f1 (average)

Out of band

(3)

spurious emission

and VDD must be set to different voltage levels, depending upon the desired TX signal (see AN5246 Usage of

FBSMPS

Table 24. RF transmitter BLE characteristics (2 Mbps)

< 1 GHz - - -62 -

 1 GHz - - -45 -

Bluetooth® Low Energy:> 0.80 0.80 - - -

dBm

(1)

Symbol Parameter Test conditions Min Typ Max Unit

SMPS Bypass or ON (V VDD > 1.95 V)

Maximum output power

SMPS Bypass or ON (V VDD > 1.71 V), Code 29

0 dBm output power

Minimum output power

FBSMPS

= 1.7 V and

(2)

= 1.4 V and

(2)

-5.5-

-3.6-

--0-

---20-

dBm

DS13258 Rev 1 61/121

113

Electrical characteristics STM32WB15CC

Table 24. RF transmitter BLE characteristics (2 Mbps)

(1)

(continued)

Symbol Parameter Test conditions Min Typ Max Unit

band

Output power variation over the band

BW6dB 6 dB signal bandwidth

4 MHz Bluetooth

IBSE In band spurious emission

 6 MHz Bluetooth

Frequency drift

maxdr Maximum drift rate

fo Frequency offset

f1 Frequency deviation average

fa

OBSE

1. Measured in conducted mode, based on reference design (see AN5165), using output power specific external RF filter and impedance matching networks to interface with a 50  antenna.

2. V

FBSMPS

SMPS on STM32WB Series microcontrollers, available on www.st.com).

3. Suitable for systems targeting compliance with worldwide radio-frequency regulations ETSI EN 300 328 and EN 300 440 Class 2 (Europe), FCC CFR47 Part 15 (US), and ARIB STD-T66 (Japan).

Frequency deviation f2 (average) / f1 (average)

Out of band

(3)

spurious emission

and VDD must be set to different voltage levels, depending upon the desired TX signal (see AN5246 Usage of

< 1 GHz - - -62 -

 1 GHz - - -45 -

Tx = 0 dBm - Typical -0.5 - 0.4 dB

Tx = maximum output power - 670 - kHz

Low Energy: -20 dBm - -55 -

Low Energy: -30 dBm -56

dBm5 MHz Bluetooth

Bluetooth® Low Energy: ±50 kHz -50 - 50 kHz

Bluetooth ±20 kHz / 50 µs

Bluetooth

Bluetooth between 450 and 550 kHz

Low Energy:

Low Energy: ±150 kHz -150 - 150

Low Energy: 

-20 - 20

450 - 550

kHz/

50 µs

Bluetooth® Low Energy:> 0.80 0.80 - - -

dBm

kHz

Table 25. RF receiver BLE characteristics (1 Mbps)

Symbol Parameter Test conditions Typ Unit

Prx_max Maximum input signal

High sensitivity mode (SMPS Bypass)

(1)

Psens

Rssi

maxrange

minrange

accu

C/Ico

High sensitivity mode (SMPS ON) -95

RSSI maximum value - -7

RSSI minimum value - -94

RSSI accuracy - 2

Co-channel rejection Bluetooth

PER <30.8% Bluetooth

Low Energy: min -10 dBm

PER <30.8%

Bluetooth® Low Energy: max -70 dBm

Low Energy: 21 dB 9

-4

-95.5

dBm

62/121 DS13258 Rev 1

STM32WB15CC Electrical characteristics

Table 25. RF receiver BLE characteristics (1 Mbps) (continued)

Symbol Parameter Test conditions Typ Unit

C/I

Adjacent channel interference

C/Image Image rejection (F

Adj  5 MHz Bluetooth

Adj  -5 MHz Bluetooth

Adj = 4 MHz Bluetooth

Adj = -4 MHz Bluetooth

Adj = 3 MHz Bluetooth

Adj = 2 MHz Bluetooth

Adj = -2 MHz Bluetooth

Adj = 1 MHz Bluetooth

Adj = -1 MHz Bluetooth

= -3 MHz) Bluetooth® Low Energy: -9 dB -28

image

|f2-f1| = 3 MHz Bluetooth

Low Energy: -27 dB

Low Energy:-27 dB

Low Energy:-15 dB

Low Energy:-27 dB

Low Energy:-17 dB

Low Energy:-15 dB

Low Energy: 15 dB

Low Energy: -50 dBm

-46

-48

-46

-33

-46 dB

-39

-35

-2

-36

P_IMD Intermodulation

P_OBB Out of band blocking

1. With ideal TX.

|f2-f1| = 4 MHz Bluetooth

|f2-f1| = 5 MHz Bluetooth

30 to 2000 MHz Bluetooth

2003 to 2399 MHz Bluetooth

2484 to 2997 MHz Bluetooth

3 to 12.75 GHz Bluetooth

Low Energy: -50 dBm

Low Energy:-50 dBm

Low Energy: -30 dBm

Low Energy: -35 dBm

Low Energy: -30 dBm

-35

-33

-2

-8

-4

dBm

DS13258 Rev 1 63/121

113

Electrical characteristics STM32WB15CC

Table 26. RF receiver BLE characteristics (2 Mbps)

Symbol Parameter Test conditions Typ Unit

Prx_max Maximum input signal

High sensitivity mode (SMPS Bypass)

(1)

Psens

Rssi

maxrange

minrange

accu

C/Ico

C/I

High sensitivity mode (SMPS ON) -92.5

RSSI maximum value - -7

RSSI minimum value - -94

RSSI accuracy - 2

Co-channel rejection Bluetooth

Adjacent channel interference

PER <30.8% Bluetooth

Low Energy: min -10 dBm

PER <30.8%

Bluetooth

Adj  8 MHz Bluetooth

Adj  -8 MHz Bluetooth

Adj = 6 MHz Bluetooth

Adj = -6 MHz Bluetooth

Adj = 4 MHz Bluetooth

Low Energy: max -70 dBm

Low Energy: 21 dB 10

Low Energy: -27 dB

Low Energy: -15 dB

Low Energy: -17 dB

-4

-92.5

-48

-44

-48

-46

-42

dBm

C/Image Image rejection (F

P_IMD Intermodulation

P_OBB Out of band blocking

1. With ideal TX.

Adj = 2 MHz Bluetooth

Adj = -2 MHz Bluetooth

= -3 MHz) Bluetooth® Low Energy: -9 dB -26

image

|f2-f1| = 6 MHz Bluetooth

|f2-f1| = 8 MHz Bluetooth

|f2-f1| = 10 MHz Bluetooth

30 to 2000 MHz Bluetooth

2003 to 2399 MHz Bluetooth

2484 to 2997 MHz Bluetooth

3 to 12.75 GHz Bluetooth

Low Energy: 15 dB

Low Energy: -50 dBm

Low Energy:-50 dBm

Low Energy: -30 dBm

Low Energy: -35 dBm

Low Energy: -30 dBm

-3

-28

-31

-30

-3

-12

-7

dBm

64/121 DS13258 Rev 1

STM32WB15CC Electrical characteristics

Table 27. RF BLE power consumption for V

Symbol Parameter Typ Unit

TX maximum output power consumption (SMPS Bypass) 12.5

txmax

TX maximum output power consumption (SMPS On, V

TX 0 dBm output power consumption (SMPS Bypass) 8.7

tx0dbm

TX 0 dBm output power consumption (SMPS On, V

FBSMPS

Rx consumption (SMPS Bypass) 7.7

rxlo

1. Power consumption including RF subsystem and digital processing.

Rx consumption (SMPS On, V

= 1.4 V) 4.5

FBSMPS

6.3.4 Operating conditions at power-up / power-down

The parameters given in Tab le 28 are derived from tests performed under the ambient temperature condition summarized in Tab le 21.

Symbol Parameter Conditions Min Max Unit

VDD

VDDA

VDDRF

Table 28. Operating conditions at power-up / power-down

VDD rise time rate

fall time rate 10 

rise time rate

DDA

fall time rate 10 

DDA

rise time rate

DDRF

fall time rate - 

DDRF

FBSMPS

= 3.3 V

(1)

= 1.7 V) 7.8

= 1.4 V) 5.2

- 

0 

- 

µs/V

DS13258 Rev 1 65/121

113

Electrical characteristics STM32WB15CC

6.3.5 Embedded reset and power control block characteristics

The parameters given in Tab le 29 are derived from tests performed under the ambient temperature conditions summarized in Table 21: General operating conditions.

Table 29. Embedded reset and power control block characteristics

Symbol Parameter Conditions

RSTTEMPO

BOR0

(2)

Reset temporization after BOR0 is detected V

Brown-out reset threshold 0

rising - 250 400 s

Rising edge 1.62 1.66 1.70

Falling edge 1.60 1.64 1.69

(2)

Rising edge 2.06 2.10 2.14

BOR1

Brown-out reset threshold 1

Falling edge 1.96 2.00 2.04

Rising edge 2.26 2.31 2.35

BOR2

Brown-out reset threshold 2

Falling edge 2.16 2.20 2.24

(1)

Min Typ Max Unit

BOR3

BOR4

PVD0

PVD1

PVD2

PVD3

PVD4

PVD5

PVD6

hyst_BORH0

hyst_BOR_PVD

(BOR_PVD)

Brown-out reset threshold 3

Brown-out reset threshold 4

Programmable voltage detector threshold 0

PVD threshold 1

PVD threshold 2

PVD threshold 3

PVD threshold 4

PVD threshold 5

PVD threshold 6

Hysteresis voltage of BORH0

Hysteresis voltage of BORH (except BORH0) and PVD

(3)

BOR

(2)

(except BOR0) and PVD

consumption from V

Rising edge 2.56 2.61 2.66

Falling edge 2.47 2.52 2.57

Rising edge 2.85 2.90 2.95

Falling edge 2.76 2.81 2.86

Rising edge 2.10 2.15 2.19

Falling edge 2.00 2.05 2.10

Rising edge 2.26 2.31 2.36

Falling edge 2.15 2.20 2.25

Rising edge 2.41 2.46 2.51

Falling edge 2.31 2.36 2.41

Rising edge 2.56 2.61 2.66

Falling edge 2.47 2.52 2.57

Rising edge 2.69 2.74 2.79

Falling edge 2.59 2.64 2.69

Rising edge 2.85 2.91 2.96

Falling edge 2.75 2.81 2.86

Rising edge 2.92 2.98 3.04

Falling edge 2.84 2.90 2.96

Hysteresis in continuous mode

Hysteresis in other mode

-20-

-30-

- - 100 -

- - 1.1 1.6 µA

66/121 DS13258 Rev 1

STM32WB15CC Electrical characteristics

Table 29. Embedded reset and power control block characteristics (continued)

Symbol Parameter Conditions

(1)

Min Typ Max Unit

PVM3

hyst_PVM3

(PVM3)

1. Continuous mode means Run/Sleep modes, or temperature sensor enable in Low-power run/Low-power sleep modes.

2. Guaranteed by design.

3. BOR0 is enabled in all modes (except Shutdown) and its consumption is therefore included in the supply current characteristics tables.

peripheral voltage monitoring

DDA

Falling edge 1.6 1.64 1.68

PVM3 hysteresis - - 10 - mV

(2)

PVM3 consumption from V

--2-µA

6.3.6 Embedded voltage reference

The parameters in Tabl e 30 are derived from tests performed under the ambient temperature and supply voltage conditions summarized in Table 21: General operating

conditions.

Rising edge 1.61 1.65 1.69

Symbol Parameter Conditions Min Typ Max Unit

Internal reference voltage –40 °C < TJ < +125 °C 1.182 1.212 1.232 V

ADC sampling time when reading

(1)

the internal reference voltage

Start time of reference voltage buffer when ADC is enable

REFINT

)

VDD when converted by ADC

S_vrefint

start_vrefint

IDD(V

REFINT

REFINTBUF

Table 30. Embedded internal voltage reference

-4

--812

buffer consumption from

- - 12.5 20

(2)

µs

µA

V

REFINT

Coeff

DDCoeff

REFINT_DIV1

REFINT_DIV2

REFINT_DIV3

1. The shortest sampling time can be determined in the application by multiple iterations.

2. Guaranteed by design.

Internal reference voltage spread over the temperature range

Temperature coefficient –40 °C < TJ < +125 °C - 30 50

Long term stability 1000 hours, TJ = 25 °C - 300 1000

Voltage coefficient 3.0 V < VDD < 3.6 V - 250 1200

1/4 reference voltage

1/2 reference voltage 49 50 51

3/4 reference voltage 74 75 76

= 3 V - 5 7.5

DS13258 Rev 1 67/121

24 25 26

(2)

ppm/°C

ppm

ppm/V

REFINT

113

Electrical characteristics STM32WB15CC

MSv40169V1

1.185

1.19

1.195

1.2

1.205

1.21

1.215

1.22

1.225

1.23

1.235

-40 -20 0 20 40 60 80 100 120

°C

Mean Min Max

Figure 14. V

6.3.7 Supply current characteristics

The current consumption is a function of several parameters and factors such as the operating voltage, ambient temperature, I/O pin loading, device software configuration, operating frequencies, I/O pin switching rate, program location in memory and executed binary code.

vs. temperature

REFINT

The current consumption is measured as described in Figure 13: Current consumption

measurement scheme.

Typical and maximum current consumption

The MCU is put under the following conditions:

 All I/O pins are in analog input mode

 All peripherals are disabled except when explicitly mentioned

 The Flash memory access time is adjusted with the minimum wait states number,

depending on the f to CPU clock (HCLK) frequency” available in the RM0473 reference manual).

 When the peripherals are enabled f

 For Flash memory and shared peripherals f

The parameters given in Tab le 31 to Ta bl e 41 are derived from tests performed under ambient temperature and supply voltage conditions summarized in Tab le 21: General

operating conditions.

frequency (refer to the table “Number of wait states according

HCLK

= f

PCLK

HCLK

PCLK

= f

HCLK

= f

HCLKS

68/121 DS13258 Rev 1

DS13258 Rev 1 69/121

Table 31. Current consumption in Run and Low-power run modes, code with data processing

running from Flash memory, ART enable (Cache ON Prefetch OFF), V

Conditions Typ Max

Symbol Parameter

-f

(Run)

Supply

current in

Run mode

= f

HCLK

16 MHz included,

= f

HCLK

HSI16

above 32 MHz

All peripherals disabled

up to

HSI16

= 32 MHz

HSE

+ PLL ON

SMPS

Supply

(LPRun)

current in

Low-power

All peripherals disabled

HCLK

= f

MSI

run mode

1. Guaranteed by characterization results (mean ± 4 ), unless otherwise specified.

HCLK

64 MHz 6.35 6.40 6.45 6.50 7.25 7.37 7.57

32 MHz 3.25 3.30 3.35 3.40 3.29 3.53 3.78

16 MHz 1.75 1.75 1.80 1.85 2.06 2.18 2.46

64 MHz 4.55 4.55 4.60 4.60 - - -

32 MHz 2.90 2.90 2.95 3.00 - - -

16 MHz 2.15 2.15 2.15 2.20 - - -

2 MHz 0.190 0.205 0.235 0.285 0.270 0.460 0.630

1 MHz 0.105 0.115 0.145 0.195 0.170 0.320 0.490

400 kHz 0.0605 0.0905 0.140 0.008 0.230 0.390 0.390

100 kHz 0.024 0.034 0.0645 0.110 0.040 0.190 0.330

= 3.3 V

(1)

25 °C 55 °C 85 °C 105 °C 25 °C 85 °C 105 °C

STM32WB15CC Electrical characteristics

Unit

70/121 DS13258 Rev 1

Table 32. Current consumption in Run and Low-power run modes, code with data processing

running from SRAM1, V

Conditions Typ Max

Symbol Parameter

-f

(Run)

Supply

current in

Run mode

= f

HCLK

16 MHz included,

= f

HCLK

+ PLL ON above

HSI16

32 MHz

All peripherals disabled

HSI16

= 32 MHz

HSE

up to

SMPS

Supply

(LPRun)

current in

Low-power

= f

HCLK

MSI

All peripherals disabled

run mode

1. Guaranteed by characterization results (mean ± 4 ), unless otherwise specified.

HCLK

64 MHz 6.75 6.80 6.85 6.85 8.05 8.22 8.41

32 MHz 3.45 3.50 3.55 3.60 3.55 3.69 4.13

16 MHz 1.85 1.85 1.90 1.90 1.77 1.94 2.26

64 MHz 4.75 4.75 4.75 4.80 - - -

32 MHz 3.00 3.00 3.05 3.10 - - -

16 MHz 2.20 2.20 2.25 2.25 - - -

2 MHz 0.200 0.215 0.245 0.290 0.330 0.600 0.850

1 MHz 0.110 0.120 0.150 0.195 0.240 0.420 0.670

400 kHz 0.0525 0.0615 0.0905 0.135 0.160 0.310 0.520

100 kHz 0.024 0.034 0.0625 0.110 0.130 0.180 0.450

= 3.3 V

(1)

25 °C 55 °C 85 °C 105 °C 25 °C 85 °C 105 °C

Electrical characteristics STM32WB15CC

Unit

STM32WB15CC Electrical characteristics

Table 33. Typical current consumption in Run and Low-power run modes, with different codes

Symbol Parameter Conditions Code

running from Flash memory, ART enable (Cache ON Prefetch OFF)

TYP

, V

Unit

= 3.3 V

TYP

Unit

25 °C 25 °C

Reduced code

6.35

(1)

Coremark 6.20 97

HCLK

= 64 MHz

Dhrystone 2.1 6.75 105

Fibonacci 6.05 95

While(1) 5.85 91

(1)

4.55 71

µA/MHz

(Run)

Supply current

in Run mode

+ PLL ON above 32 MHz

HSI16

SMPS ON, 

= 64 MHz

HCLK

Reduced code

Coremark 4.45 70

Dhrystone 2.1 4.75 74

Fibonacci 4.40 69

All peripherals disabled

While(1) 4.30 67

Reduced code

(1)

2.27 35

up to 16 MHz included, f

SMPS ON,  f

HSI16

HCLK

Tx level = 0 dBm

= f

HCLK

= 64 MHz, RF

Coremark 2.22 34

Dhrystone 2.1 2.37 34

(2)

Fibonacci 2.19 34

While(1) 2.14 33

Reduced code

Coremark 190 95

Dhrystone 2.1 215 108

Fibonacci 185 93

(LPRun)

Supply current

Low-power run

= f

HCLK

MSI

= 2 MHz

All peripherals disabled

While(1) 175 88

1. Reduced code used for characterization results provided in Table 31 and Table 32.

2. Value computed. MCU consumption when RF TX and SMPS are ON.

(1)

190

µA

µA/MHz

DS13258 Rev 1 71/121

113

Electrical characteristics STM32WB15CC

Table 34. Typical current consumption in Run and Low-power run modes,

with different codes running from SRAM1

Symbol Parameter Conditions Code

Reduced code

Coremark 6.30 98

HCLK

+ PLL ON above 32 MHz

= 64 MHz

Dhrystone 2.1 6.20 97

Fibonacci 6.05 95

While(1) 6.20 98

Reduced code

, V

= 3.3 V

TYP

25 °C 25 °C

(1)

6.75

(1)

4.75 74

Unit

TYP

Unit

105

Coremark 4.50 70

Dhrystone 2.1 4.50 70

IDD(Run)

Supply current

in Run mode

HSI16

SMPS ON, 

= 64 MHz

HCLK

Fibonacci 4.40 69

All peripherals disabled

While(1) 4.50 70

Reduced code

up to 16 MHz included, f

SMPS ON,  f

HCLK

HSI16

Tx level = 0 dBm

= f

HCLK

= 64 MHz, RF

Coremark 2.24 35

Dhrystone 2.1 2.24 35

(2)

Fibonacci 2.19 34

While(1) 2.24 35

Reduced code

Coremark 190 95

Dhrystone 2.1 185 93

Fibonacci 180 90

(LPRun)

Supply current

Low-power run

= f

HCLK

MSI

= 2 MHz

All peripherals disabled

While(1) 185 93

1. Reduced code used for characterization results provided in Table 31 and Table 32.

2. Value computed. MCU consumption when RF TX and SMPS are ON.

(1)

2.37 37

(1)

200

µA

µA/MHz

100

µA/MHz

72/121 DS13258 Rev 1

DS13258 Rev 1 73/121

Table 35. Current consumption in Sleep and Low-power sleep modes, Flash memory ON

Conditions TYP MAX

Symbol Parameter

All peripherals disabled f

HCLK

64 MHz 1.80 1.85 1.85 1.90 2.04 2.20 2.48

32 MHz 0.990 1.00 1.05 1.10 0.980 1.22 1.52

16 MHz 0.605 0.610 0.640 0.685 0.690 0.910 1.15

64 MHz 2.30 2.30 2.30 2.35 - - -

32 MHz 1.80 1.80 1.80 1.85 - - -

(Sleep)

Supply

current in

Sleep mode,

= f

HCLK

HSI16

included,

= f

HCLK

HSI16

HSE

+ PLL ON above

32 MHz

up to 16 MHz

up to 32 MHz

SMPS

16 MHz 1.60 1.60 1.60 1.65 - - -

2 MHz 0.055 0.065 0.095 0.145 0.080 0.240 0.400

Supply

(LPSleep)

current in

Low-power

sleep mode

HCLK

= f

MSI

1 MHz 0.036 0.047 0.0765 0.125 0.060 0.210 0.360

400 kHz 0.022 0.033 0.0625 0.110 0.030 0.180 0.320

100 kHz 0.016 0.0265 0.057 0.105 0.030 0.170 0.320

1. Guaranteed by characterization results (mean ± 4 ), unless otherwise specified.

STM32WB15CC Electrical characteristics

(1)

Unit

25 °C 55 °C 85 °C 105 °C 25 °C 85 °C 105 °C

Table 36. Current consumption in Low-power sleep modes, Flash memory in Power down

Conditions TYP MAX

Symbol Parameter

All peripherals disabled f

Supply

(LPSleep)

current in

low-power

HCLK

= f

MSI

sleep mode

1. Guaranteed by characterization results (mean ± 4 ), unless otherwise specified.

HCLK

2 MHz 55 66 96 145 79 291 520

1 MHz 37 47 77 125 62 252 480

400 kHz 22 33 63 110 36 225 436

100 kHz 17 27 57 105 34 219 432

(1)

Unit

25 °C 55 °C 85 °C 105 °C 25 °C 85 °C 105 °C

µA

74/121 DS13258 Rev 1

Conditions TYP MAX

Table 37. Current consumption in Stop 1 mode

(1)

Symbol Parameter

-V

0 °C 25 °C 40 °C 55 °C 85 °C 105 °C 0 °C 25 °C 85 °C 105 °C

1.8 V 1.90 3.05 7.35 9.95 31.5 64.0 2.6 9.4 112.8 225.1

(Stop 1)

Supply current

in Stop 1 mode,

RTC disabled

BLE disabled

2.4 V 1.85 3.05 5.50 10.0 31.0 64.5 - - - -

3.0 V 1.85 3.05 5.55 10.0 31.5 65.5 2.5 9.3 112.6 227.3

3.6 V 1.90 3.10 5.65 10.0 32.0 67.0 2.6 9.4 115.2 233.5

1.8 V 2.15 3.35 7.55 10.5 31.5 64.5 3.0 10.6 112.2 221.8

2.4 V 2.20 3.45 5.85 10.5 31.5 65.0 - - - -

3.0 V 2.30 3.50 6.00 10.5 32.0 66.0 3.1 10.9 114.0 229.0

3.6 V 2.45 3.65 6.25 11.0 32.5 67.5 3.4 10.9 115.4 230.5

1.8 V 2.00 3.35 7.85 10.5 31.5 64.5 2.2 10.1 112.3 221.6

2.4 V 2.05 3.45 5.90 10.5 31.5 65.0 - - - -

(2)

3.0 V 2.25 3.60 6.05 10.5 32.0 66.0 2.9 10.7 113.8 228.3

(Stop 1

with

RTC)

Supply current in Stop 1 mode, RTC enabled, BLE disabled

RTC clocked

by LSI

RTC clocked by LSE quartz Low drive mode

3.6 V 2.40 3.75 6.30 11.0 32.5 67.5 3.1 11.0 114.6 230.1

Supply current

(wakeup

from

Stop1)

1. Guaranteed based on test during characterization (mean ± 4 ), unless otherwise specified.

2. Based on characterization done with a 32.768 kHz crystal (MC306-G-06Q-32.768, manufacturer JFVNY) with two 6.8 pF loading capacitors.

3. Wakeup with code execution from Flash memory. Average value given for a typical wakeup time as specified in Table 44: Low-power mode wakeup

during wakeup from Stop 1 bypass mode

timings.

Wakeup clock  HSI16. See

Wakeup clock  MSI = 32 MHz. See

(3)

3.0 V

-TBD--------

Electrical characteristics STM32WB15CC

Unit

µA

DS13258 Rev 1 75/121

Conditions TYP MAX

Table 38. Current consumption in Stop 0 mode

(1)

Symbol Parameter

-V

0 °C 25 °C 40 °C 55 °C 85 °C 105 °C 0 °C 25 °C 85 °C 105 °C

1.8 V 97.5 100 105 110 140 180 112.3 114.2 328.9 499.9

Supply current

in Stop 0 mode,

RTC disabled,

BLE disabled

(Stop 0)

Supply current

during wakeup

from Stop 0

Bypass mode

1. Guaranteed based on test during characterization (mean ± 4 ), unless otherwise specified.

2. Wakeup with code execution from Flash memory. Average value given for a typical wakeup time as specified in Table 44: Low-power mode wakeup

timings.

Wakeup clock

HSI16. See

Wakeup clock

MSI = 32 MHz.

See

(2)

2.4 V 99.5 100 105 115 140 180 - - - -

3.0 V 100 105 110 115 140 180 119.1 134.3 331.5 495.0

3.6 V 100 105 110 115 145 185 165.0 135.7 358.2 511.1

(2)

-TBD--------

3.0 V

-TBD--------

STM32WB15CC Electrical characteristics

Unit

µA

Symbol Parameter

Supply current in Standby

(Standby)

mode (backup registers and SRAMs retained),  RTC disabled

Table 39. Current consumption in Standby mode

Conditions TYP MAX

-VDD0 °C 25 °C 40 °C 55 °C 85 °C 105 °C 0 °C 25 °C 85 °C 105 °C

BLE disabled No independent watchdog

BLE disabled with independent watchdog

1.8 V

2.4 V

3.0 V

3.6 V

1.8 V

2.4 V

3.0 V

3.6 V

235 335 507 900 2900 6200 261 867 6599 14593

250 345 540 935 3000 6550 - - - -

255 355 565 985 3150 6950 334 907 6959 15509

280 390 625 1050 3400 7600 373 989 7270 16213

415 515 677 1100 3100 6350 814 1074 24 14741

465 565 765 1150 3200 6750 - - - -

520 625 840 1250 3400 7250 1309 1169 7188 15832

595 715 950 1400 3750 7900 1716 1259 7630 16403

(1)

Unit

76/121 DS13258 Rev 1

Table 39. Current consumption in Standby mode (continued)

Symbol Parameter

Conditions TYP MAX

-VDD0 °C 25 °C 40 °C 55 °C 85 °C 105 °C 0 °C 25 °C 85 °C 105 °C

RTC clocked by LSI, no independent

Supply current

watchdog

in Standby

(Standby

with RTC)

mode (backup registers and SRAMs retained), 

RTC clocked by LSI, with independent

watchdog RTC enabled BLE disabled

RTC clocked

by LSE 

(2)

quartz

in low

drive mode

Supply current to be

(SRAM)

subtracted in

(3)

Standby mode

when SRAM is not retained

(wakeup

from

Standby)

1. Guaranteed based on test during characterization (mean ± 4 ), unless otherwise specified.

2. Based on characterization done with a 32.768 kHz crystal (MC306-G-06Q-32.768, manufacturer JFVNY) with two 6.8 pF loading capacitors.

3. The supply current in Standby with SRAMs mode is: I + RTC) + IDD(SRAM).

4. Wakeup with code execution from Flash memory. Average value given for a typical wakeup time as specified in Table 44.

Supply current during wakeup from Standby mode

Wakeup clock is HSI16.

(4)

See

1.8 V

2.4 V

3.0 V

3.6 V

1.8 V

2.4 V

3.0 V

3.6 V

1.8 V

2.4 V

3.0 V

3.6 V

1.8 V

2.4 V 85.0 100 145 240 850 2050 - - - -

3.0 V

3.6 V

3.0 V

515 610 791 1200 3150 6450 700 1184 6933 15007

600 700 900 1300 3350 6900 - - - -

700 800 1000 1450 3600 7400 898 1419 8182 16026

815 935 1150 1600 3950 8100 995 1569 604 16995

550 650 830 1200 3200 6500 715 1187 6986 14984

650 750 950 1350 3400 6950 - - - -

765 865 1100 1500 3650 7500 1085 1487 7358 16358

905 1000 1250 1700 4050 8200 1190 1641 8042 17295

545 655 920 1250 3250 6550 623 1112 6958 14936

645 755 955 1350 3400 7000 - - - -

760 875 1100 1500 3700 7550 588 1094 7332 16285

920 1050 1300 1750 4100 8300 738 1171 7757 17377

79.0 92.0 130 215 730 1750 - - - -

95.0 110 165 285 1000 2450 - - - -

115 150 220 370 1250 3000 - - - -

-TBD--------

(Standby) + IDD(SRAMs). The supply current in Standby with RTC with SRAM mode is: IDD(Standby

(1)

Electrical characteristics STM32WB15CC

Unit

DS13258 Rev 1 77/121

Conditions TYP MAX

Table 40. Current consumption in Shutdown mode

(1)

Symbol Parameter

-V

Supply current in Shutdown

(Shutdown)

mode (backup registers

retained) RTC disabled

Supply current

(Shutdown

with RTC)

in Shutdown mode (backup registers retained) RTC enabled

1. Guaranteed based on test during characterization (mean ± 4 ), unless otherwise specified.

2. Based on characterization done with a 32.768 kHz crystal (MC306-G-06Q-32.768, manufacturer JFVNY) with two 6.8 pF loading capacitors.

RTC clocked by LSE

(2)

quartz low drive mode

1.8 V

2.4 V

3.0 V

3.6 V

1.8 V

2.4 V

3.0 V

3.6 V

Table 41. Current consumption in VBAT mode

Conditions TYP MAX

0 °C 25 °C 40 °C 55 °C 85 °C 105 °C 0 °C 25 °C 85 °C 105 °C

5.00 12.0 31.0 74.0 365 990 - - 1207 3148

10.0 18.0 41.0 93.0 440 1200 - - - -

16.0 28.0 58.0 125 560 1500 - 140 1495 3874

34.0 54.0 99.0 190 745 1900 - 143 1788 4339

310 330 355 405 710 1350 - 2295 1948 3627

405 425 455 515 875 1650 - - - -

525 550 585 660 1100 2050 - 2310 2193 4635

680 710 760 860 1450 2600 - 2283 2704 5463

(1)

Symbol Parameter

-V

1.8 V

0 °C 25 °C 40 °C 55 °C 85 °C 105 °C 0 °C 25 °C 40 °C 55 °C 85 °C 105 °C

BAT

1.00 1.00 4.00 11.0 54.0 145 - - - - - -

STM32WB15CC Electrical characteristics

Unit

RTC disabled

Backup

domain

(VBAT)

supply current

RTC enabled and clocked by LSE quartz

1. Guaranteed based on test during characterization (mean ± 4 ), unless otherwise specified.

2. Based on characterization done with a 32.768 kHz crystal (MC306-G-06Q-32.768, manufacturer JFVNY) with two 6.8 pF loading capacitors.

2.4 V 1.00 2.00 5.00 13.0 62.0 165 - - - - - -

3.0 V 1.00 3.00 8.00 19.0 88.0 245 - - - - - -

3.6 V 2.00 6.00 15.0 33.0 145 375 - - - - - -

1.8 V 200 210 220 235 290 385 - - - - - -

2.4 V 250 265 275 285 350 460 - - - - - -

3.0 V 315 330 340 360 440 605 - - - - - -

(2)

3.6 V 405 415 430 455 580 820 - - - - - -

78/121 DS13258 Rev 1

Table 42. Current under Reset condition

TYP MAX

Symbol Conditions

0 °C 25 °C 40 °C 55 °C 85 °C 105 °C 0 °C 25 °C 40 °C 55 °C 85 °C 105 °C

1.8 V 310 315 320 330 365 420 - - - - - -

DD(RST)

2.4 V 330 335 345 350 385 445 - - - - - -

3.0 V 350 355 365 370 410 465 - 484 - - - -

3.6 V 370 375 385 390 430 485 - - - - - -

1. Guaranteed by characterization results, unless otherwise specified.

Electrical characteristics STM32WB15CC

(1)

Unit

µA

STM32WB15CC Electrical characteristics

DDfSW

C=

I/O system current consumption

The current consumption of the I/O system has two components: static and dynamic.

I/O static current consumption

All the I/Os used as inputs with pull-up generate current consumption when the pin is ex

ternally held low. The value of this current consumption can be simply computed by using

the pull-up/pull-down resistors values given in Ta bl e 64: I/O static characteristics.

For the output pins, any external pull-down or ext estimate the current consumption.

Additional I/O current consumption is due to I/Os co voltage level is externally applied. This current consumption is caused by the input Schmitt trigger circuits used to discriminate the input value. Unless this specific configuration is required by the application, this supply current consumption can be avoided by configuring these I/Os in analog mode. This is notably the case of ADC input pins which should be configured as analog inputs.

Caution: An

as a result of external electromagnetic noise. To avoid current consumption related to floating pins, they must either be configured in analog mode, or forced internally to a definite digital value. This can be done either by using pull-up/down resistors or by configuring the pins in output mode.

I/O dynamic current consumption

In addition to the internal peripheral current consumption measured previously (see

Tab l e 43) the I/Os used by the application also contribute to the current consumption.

When an I/O pin switches, it uses the current f pin circuitry and to charge/discharge the capacitive load (internal or external) connected to the pin:

where

 I

 V

 f

 C is the total capacitance seen by the I/O pin: C = C

 C

ernal load must also be considered to

nfigured as inputs if an intermediate

y floating input pin can also settle to an intermediate voltage level or switch inadvertently,

rom the I/O supply voltage to supply the I/O

is the current sunk by a switching I/O to charge/discharge the capacitive load

is the I/O supply voltage

is the I/O switching frequency

+ C

I/O

EXT

is the I/O pin capacitance

I/O

is the PCB board capacitance plus any connected external device pin

EXT

capacitance.

The test pin is configured in push-pull output frequency.

DS13258 Rev 1 79/121

mode and is toggled by software at a fixed

113

Electrical characteristics STM32WB15CC

On-chip peripheral current consumption

The current consumption of the on-chip peripherals is given in Tabl e 43. The MCU is placed under the following conditions:

 All I/O pins are in Analog mode

 The given value is measured as the difference of the current consumptions when the

peripheral is clocked on and when it is clocked off

 Ambient operating temperature and supply voltage conditions summarized in Table 17:

Voltage characteristics

 The power consumption of the digital part of the on-chip peripherals is given in

Table 43. The power consumption of the analog part of the peripherals (where

applicable) is indicated in each related section of the datasheet.

Table 43. Peripheral current consumption

AHB1

(2)

AHB2

AHB Shared

Peripheral Run

Bus Matrix

TSC 0.940 0.900

CRC 0.400 0.380

DMA1 1.70 1.60

DMAMUX 1.90 1.80

All AHB1 peripherals 5.30 5.00

All AHB2 peripherals 1.70 1.70

TRNG independent clock domain 2.35 NA

TRNG clock domain 1.55 NA

SRAM2 1.35 1.25

FLASH 7.05 6.70

AES2 5.30 5.45

PKA 2.80 2.70

All AHB shared peripherals 14.5 15.5

(1)

2.10 1.70

Low-power

run and Sleep

Unit

µA/MHz

80/121 DS13258 Rev 1

STM32WB15CC Electrical characteristics

Table 43. Peripheral current consumption (continued)

APB1

APB2

Peripheral Run

RTCA 0.940 0.875

I2C1 independent clock domain 1.95 3.90

I2C1 clock domain 3.75 4.10

LPTIM1 independent clock domain 1.95 2.90

LPTIM1 clock domain 3.45 3.60

TIM2 4.55 4.00

LPTIM2 clock domain 3.45 3.70

LPTIM2 independent clock domain 1.95 2.90

WWDG 0.350 0.625

LPUART1 independent clock domain 2.60 3.70

LPUART1 clock domain 4.55 4.05

All APB1 peripherals 15.5 16.0

AHB to APB2

TIM1 6.25 6.10

USART1 independent clock domain 3.05 6.50

USART1 clock domain 6.25 5.50

SPI1 1.25 1.05

(3)

0.900 1.10

Low-power

run and Sleep

Unit

µA/MHz

ADC1 independent clock domain 0.940 0.600

ADC1 clock domain 0.780 0.600

All APB2 on 14.5 15.5

ALL 51.5 48.0

1. The BusMatrix is automatically active when at least one master is ON (CPU, DMA).

2. GPIOs consumption during read and write accesses.

3. The AHB to APB2 bridge is automatically active when at least one peripheral is ON on the APB2.

6.3.8 Wakeup time from Low-power modes and voltage scaling transition times

The wakeup times given in Table 44 are the latency between the event and the execution of the first user instruction.

The device goes in Low-power mode after the WFE (Wait For Event) instruction.

DS13258 Rev 1 81/121

113

Electrical characteristics STM32WB15CC

Table 44. Low-power mode wakeup timings

(1)

Symbol Parameter Conditions Typ Max Unit

Wakeup time from

WUSLEEP

Sleep mode

-TBDTBD

to Run mode

WULPSLEEP

WUSTOP0

Wakeup time from  Low-power sleep mode to Low-power run mode

Wake up time from Stop 0 mode  to Run mode in Flash memory

Wake up time from

Wakeup in Flash with memory in power-down during low-power sleep mode (FPDS = 1 in PWR_CR1) and with clock MSI = 2 MHz

Wakeup clock MSI = 32 MHz TBD TBD

Wakeup clock HSI16 = 16 MHz TBD TBD

Wakeup clock MSI = 32 MHz TBD TBD

TBD TBD

Stop 0 mode  to Run mode in SRAM1

Wake up time from

Wakeup clock HSI16 = 16 MHz TBD TBD

Wakeup clock MSI = 32 MHz TBD TBD Stop 1 mode  to Run in Flash memory

Wake up time from

Wakeup clock HSI16 = 16 MHz TBD TBD

Wakeup clock MSI = 32 MHz TBD TBD Stop 1 mode 

Wakeup clock HSI16 = 16 MHz TBD TBD

TBD TBD

Wakeup clock MSI = 4 MHz

TBD TBD

WUSTOP1

to Run in SRAM1

Wake up time from Stop 1 mode to  Low-power run mode in Flash memory

Wake up time from Stop 1 mode to  Low-power run mode

Regulator in Low-power mode (LPR = 1 in PWR_CR1)

in SRAM1

Wakeup time from

WUSTBY

Standby mode

- Wakeup clock HSI16 = 16 MHz TBD TBD

to Run mode

1. Guaranteed by characterization results (VDD = 3 V, T = 25 °C).

No. of

CPU

cycles

µs

Table 45. Regulator modes transition times

(1)

Symbol Parameter Conditions Typ Max Unit

WULPRUN

1. Guaranteed by characterization results (VDD = 3 V, T = 25 °C).

2. Time until REGLPF flag is cleared in PWR_SR2.

Wakeup time from Low-power run mode to Run mode

(2)

Code run with MSI 2 MHz TBD TBD µs

82/121 DS13258 Rev 1

STM32WB15CC Electrical characteristics

Table 46. Wakeup time using LPUART

(1)

Symbol Parameter Conditions Typ Max Unit

WULPPUART

LPUART baud rate allowing to wakeup up from Stop mode when LPUART clock source is HSI16

1. Guaranteed by design.

Wakeup time needed to calculate the maximum

Stop mode 0 - TBD

Stop mode 1 - TBD

6.3.9 External clock source characteristics

High-speed external user clock generated from an external source

The high-speed external (HSE) clock is supplied with a 32 MHz crystal oscillator or a sine wave.

The STM32WB15CC include internal programmable capacitances that can be used to tune the crystal frequency in order to compensate the PCB parasitic one.

The characteristics in Tabl e 47 and Ta b le 49 are measured over recommended operating conditions, unless otherwise specified. Typical values are referred to TA = 25 °C and  VDD = 3.0 V.

Table 47. HSE crystal requirements

Symbol Parameter Conditions Min Typ Max Unit

(1)

µs

NOM

Oscillator frequency - - 32 - MHz

Includes initial accuracy, stability over

TOL

Frequency tolerance

temperature, aging and frequency pulling

- - 50 ppm

due to incorrect load capacitance.

Load capacitance - 6 - 8 pF

ESR Equivalent series resistance - - - 100 

1. 32 MHz XTAL is specified for two specific references: NX2016SA and NX1612SA.

Table 48. HSE clock source requirements

(1)

Symbol Parameter Conditions Min Typ Max Unit

HSE_ext

TOL

HSE

User external clock source frequency - 32 - MHz

Frequency tolerance

Clock input voltage limits Sine wave, AC-coupled

Includes initial accuracy, stability over temperature and aging.

(2)

--50ppm

0.4 - 1.6 V

DuCy(HSE) Duty cycle - 45 50 55 %

1. Guaranteed by design.

2. Only AC coupled is supported (capacitor 470 pF to 100 nF).

DS13258 Rev 1 83/121

113

Electrical characteristics STM32WB15CC

Table 49. HSE oscillator characteristics

Symbol Parameter Conditions Min Typ Max Unit

SUA(HSE)

Startup time  for 80% amplitude stabilization

stabilized, XOTUNE=000000, 

DDRF

–40 to +125 °C range

- 1000 -

µs

SUR(HSE)

DDRF(HSE)

XOT

g(HSE)

XOT

fp(HSE)

XOT

nb(HSE)

XOT

st(HSE)

Startup time  for XOREADY signal

HSE current consumption HSEGMC=000, XOTUNE=000000 - 50 - µA

XOTUNE granularity

XOTUNE frequency pulling ±20 ±40 -

XOTUNE number of tuning bits - 6 - bit

XOTUNE setting time - - 0.1 ms

stabilized, XOTUNE=000000, 

DDRF

–40 to +125 °C range

Capacitor bank

-250 -

-15 ppm

Offset = 10 kHz - - -127

(1)



n(HSE)

Phase noise for 32 MHz

dBc / HzOffset = 100 kHz - - -135

Offset = 1 MHz - - -138

1. Guaranteed only with a 32 MHz Xtal.

Note: For information about the trimming of the oscillator refer to AN5165 “Development of RF

hardware using STM32WB microcontrollers”, available on www.st.com.

Low-speed external user clock generated from an external source

The low-speed external (LSE) clock can be supplied with a 32.768 kHz crystal resonator oscillator. The information provided in this section is based on design simulation results obtained with typical external components specified in resonator and the load capacitors have to be placed as close as possible to the oscillator pins to minimize output distortion and startup stabilization time.

Refer to the crystal resonator manufacturer for more details on the resonator characteristics (frequency, package, accuracy).

Symbol Parameter Conditions Min Typ Max Unit

DD(LSE)

LSE current consumption

Table 50. Low-speed external user clock characteristics

LSEDRV[1:0] = 00

Low drive capability

LSEDRV[1:0] = 01

Medium low drive capability

LSEDRV[1:0] = 10

Medium high drive capability

LSEDRV[1:0] = 11

High drive capability

Tabl e 50. In the application, the

(1)

-250-

-315-

-500-

-630-

84/121 DS13258 Rev 1

STM32WB15CC Electrical characteristics

MS30253V2

OSC32_IN

OSC32_OUT

Drive

programmable

amplifier

LSE

32.768 kHz resonator

Resonator with integrated capacitors

Table 50. Low-speed external user clock characteristics

(1)

(continued)

Symbol Parameter Conditions Min Typ Max Unit

LSEDRV[1:0] = 00

Low drive capability

LSEDRV[1:0] = 01

Medium low drive capability

mcritmax

Maximum critical crystal g

LSEDRV[1:0] = 10

Medium high drive capability

LSEDRV[1:0] = 11

High drive capability

(2)

SU(LSE)

1. Guaranteed by design.

2. t

SU(LSE)

reached. This value is measured for a standard crystal and it can vary significantly with the crystal manufacturer.

Startup time VDD stabilized - 2 - s

is the startup time measured from the moment it is enabled (by software) until a stable 32 kHz oscillation is

- - 0.50

- - 0.75

µA / V

- - 1.70

- - 2.70

Note: For information on selecting the crystal refer to application note AN2867 “Oscillator design

guide for STM8S, STM8A and STM32 microcontrollers” available from www.st.com.

Figure 15. Typical application with a 32.768 kHz crystal

Note: No external resistors are required between OSC32_IN and OSC32_OUT, and it is forbidden

to add one.

In bypass mode the LSE oscillator is switched off and the input pin is a standard GPIO.

The external clock signal has to respect the I/O characteristics detailed in Section 6.3.16. The recommend clock input waveform is shown in Figure 16.

DS13258 Rev 1 85/121

113

Electrical characteristics STM32WB15CC

MS19215V2

LSEH

f(LSE)

90%

10%

LSE

r(LSE)

LSEL

w(LSEH)

w(LSEL)

Figure 16. Low-speed external clock source AC timing diagram

Table 51. Low-speed external user clock characteristics

Symbol Parameter Conditions Min Typ Max Unit

LSE_ext

LSEH

LSEL

w(LSEH)

w(LSEL)

tolLSE

1. Guaranteed by design.

User external clock source frequency

OSC32_IN input pin high level voltage

OSC32_IN input pin low level voltage

OSC32_IN high or low time

Frequency tolerance

Includes initial accuracy, stability over temperature, aging and frequency pulling

- 21.2 32.768 44.4 kHz

- 0.7 V

-V

- 250 - - ns

6.3.10 Internal clock source characteristics

The parameters given in Tab le 52 are derived from tests performed under ambient temperature and supply voltage conditions summarized in Table 21: General operating

conditions. The provided curves are characterization results, not tested in production.

(1)

– Bypass mode

DDx

-V

DDx

- 0.3 V

DDx

-500 - +500 ppm

High-speed internal (HSI16) RC oscillator

Symbol Parameter Conditions Min Typ Max Unit

HSI16

86/121 DS13258 Rev 1

HSI16 frequency V

Table 52. HSI16 oscillator characteristics

(1)

= 3.0 V, TA= 30 °C 15.88 - 16.08 MHz

STM32WB15CC Electrical characteristics

MSv39299V1

15.6

15.7

15.8

15.9

16.1

16.2

16.3

16.4

MHz

min mean max

+1%

-1%

+2%

-2%

+1.5%

-1.5%

-40 -20 0 20 40 60 80 100 120 °C

Table 52. HSI16 oscillator characteristics

(1)

(continued)

Symbol Parameter Conditions Min Typ Max Unit

Trimming code is not a multiple of 64

0.2 0.3 0.4

TRIM HSI16 user trimming step

(HSI16)

(2)

Duty cycle - 45 - 55

HSI16 oscillator frequency drift over temperature

HSI16 oscillator frequency drift over V

HSI16 oscillator start-up time - - 0.8 1.2

(2)

HSI16 oscillator stabilization time - - 3 5

(2)

HSI16 oscillator power consumption - - 155 190 A

DuCy(HSI16)



Te mp



VDD

tsu(HSI16)

(HSI16)

stab

(HSI16)

1. Guaranteed by characterization results.

2. Guaranteed by design.

Trimming code is a multiple of 64

= 0 to 85 °C -1 - 1

= –40 to 125 °C -2 - 1.5

VDD = 1.62 V to 3.6 V -0.1 - 0.05

-4 -6 -8

Figure 17. HSI16 frequency vs. temperature

s

DS13258 Rev 1 87/121

113

Electrical characteristics STM32WB15CC

Multi-speed internal (MSI) RC oscillator

Table 53. MSI oscillator characteristics

Symbol Parameter Conditions Min Typ Max Unit

Range 0 98.7 100 101.3

Range 1 197.4 200 202.6

Range 2 394.8 400 405.2

Range 3 789.6 800 810.4

Range 4 0.987 1 1.013

(1)

kHz



TEMP

MSI

(MSI)

MSI frequency after factory calibration, done at V

TA=30 °C

MSI oscillator

(2)

frequency drift over temperature

=3 V and

MSI mode

PLL mode XTAL=

32.768 kHz

MSI mode

Range 5 1.974 2 2.026

Range 6 3.948 4 4.052

Range 7 7.896 8 8.104

Range 8 15.79 16 16.21

Range 9 23.69 24 24.31

Range 10 31.58 32 32.42

Range 11 47.38 48 48.62

Range 0 - 98.304 -

Range 1 - 196.608 -

Range 2 - 393.216 -

Range 3 - 786.432 -

Range 4 - 1.016 -

Range 5 - 1.999 -

Range 6 - 3.998 -

Range 7 - 7.995 -

Range 8 - 15.991 -

Range 9 - 23.986 -

Range 10 - 32.014 -

Range 11 - 48.005 -

TA= 0 to 85 °C -3.5 - 3

= –40 to 125 °C -8 - 6

MHz

kHz

MHz

88/121 DS13258 Rev 1

STM32WB15CC Electrical characteristics

Table 53. MSI oscillator characteristics

(1)

(continued)

Symbol Parameter Conditions Min Typ Max Unit



VDD

(MSI)

MSI oscillator frequency drift

(2)

over VDD (reference is 3 V)

MSI mode

Range 0 to 3

Range 4 to 7

VDD =  1,62 to 3.6 V

= 

2.4 to 3.6 V

= 

1,62 to 3.6 V

= 

2.4 to 3.6 V

= 

1.62 to 3.6 V

-1.2 -

0.5

-0.5 -

-2.5 -

0.7

-0.8 -

-5 -

Range 8 to 11

= 

F

SAMPLING

(2)(4)

(MSI)

CC jitter(MSI)

P jitter(MSI)

2.4 to 3.6 V

Frequency variation in sampling mode

RMS cycle-to-

(4)

cycle jitter

(4)

RMS period jitter PLL mode Range 11 - - 50 -

(3)

PLL mode Range 11 - - 60 -

TA= –40 to 105 °C - 1 2

= –40 to 125 °C - 2 4

-1.6 -

STAB

(MSI)

MSI oscillator

(4)

start-up time

MSI oscillator

(4)

stabilization time

Range 0 - - 10 20

Range 1 - - 5 10

Range 2 - - 4 8

Range 3 - - 3 7

Range 4 to 7 - - 3 6

Range 8 to 11 - - 2.5 6

PLL mode Range 11

10 % of final frequency

5 % of final frequency

1 % of final frequency

- - 0.25 0.5

--0.51.25

---2.5

s

DS13258 Rev 1 89/121

113

Electrical characteristics STM32WB15CC

Table 53. MSI oscillator characteristics

(1)

(continued)

Symbol Parameter Conditions Min Typ Max Unit

Range 0 - - 0.6 1

Range 1 - - 0.8 1.2

Range 2 - - 1.2 1.7

Range 3 - - 1.9 2.5

Range 4 - - 4.7 6

IDD(MSI)

(4)

MSI oscillator power consumption

MSI and PLL mode

Range 5 - - 6.5 9

Range 6 - - 11 15

Range 7 - - 18.5 25

Range 8 - - 62 80

Range 9 - - 85 110

Range 10 - - 110 130

Range 11 - - 155 190

1. Guaranteed by characterization results.

2. This is a deviation for an individual part once the initial frequency has been measured.

3. Sampling mode means Low-power run/Low-power sleep modes with Temperature sensor disable.

4. Guaranteed by design.

µA

Figure 18. Typical current consumption vs. MSI frequency

90/121 DS13258 Rev 1

STM32WB15CC Electrical characteristics

Low-speed internal (LSI) RC oscillator

Table 54. LSI1 oscillator characteristics

Symbol Parameter Conditions Min Typ Max Unit

= 3.0 V, TA = 30 °C 31.04 - 32.96

LSI

(LSI1)

STAB

IDD(LSI1)

1. Guaranteed by characterization results.

2. Guaranteed by design.

LSI1 frequency

(2)

LSI1 oscillator start-up time - - 80 130

(2)

LSI1 oscillator stabilization time 5% of final frequency - 125 180

LSI1 oscillator power

(2)

consumption

= 1.62 to 3.6 V, TA = -40 to 125 °C 29.5 - 34

- - 110 180 nA

(1)

kHz

s

Table 55. LSI2 oscillator characteristics

(1)

Symbol Parameter Conditions Min Typ Max Unit

VDD = 3.0 V, TA = 30 °C TBD - TBD

= 1.62 to 3.6 V, TA = -40 to 125 °C TBD - TBD

kHz

LSI2

(LSI2)

Frequency

(3)

Start-up time - TBD - TBD ms

(3)

Power consumption - - TBD TBD nA

(2)

TEMP(LSI2) Stability over temperature - TBD - TBD ppm/ °C

1. Guaranteed by characterization results.

2. LSI2 cannot be trimmed.

3. Guaranteed by design.

6.3.11 PLL characteristics

The parameters given in Tab le 56 are derived from tests performed under temperature and VDD supply voltage conditions summarized in Tab le 21: General operating conditions.

Table 56. PLL characteristics

Symbol Parameter Conditions Min Typ Max Unit

(2)

PLL_IN

PLL_P_OUT

PLL_Q_OUT

PLL_R_OUT

VCO_OUT

LOCK

PLL input clock

PLL input clock duty cycle - 45 - 55 %

PLL multiplier output clock P - 2 - 64

PLL multiplier output clock Q - 8 - 64

PLL multiplier output clock R - 8 - 64

PLL VCO output - 96 - 344

PLL lock time - - 15 40 s

RMS cycle-to-cycle jitter

Jitter

System clock 64 MHz

RMS period jitter - 30 -

(1)

-2.66-16MHz

MHz

-40ps

DS13258 Rev 1 91/121

113

Electrical characteristics STM32WB15CC

Table 56. PLL characteristics

(1)

(continued)

Symbol Parameter Conditions Min Typ Max Unit

VCO freq = 96 MHz - 200 260

IDD(PLL)

PLL power consumption

(1)

on V

VCO freq = 344 MHz - 520 650

1. Guaranteed by design.

2. Take care of using the appropriate division factor M to obtain the specified PLL input clock values. The M factor is shared between the two PLLs.

6.3.12 Flash memory characteristics

Table 57. Flash memory characteristics

Symbol Parameter Conditions Typ Max Unit

prog

prog_row

prog_page

ERASE

64-bit programming time - 81.7 90.8 µs

One row (64 double word) programming time

One page (2 Kbytes) programming time

Normal programming 5.2 5.5

Fast programming 3.8 4.0

Normal programming 41.8 43.0

Fast programming 30.4 31.0

Page (2 Kbytes) erase time - 22.0 24.5

Mass erase time - 22.1 25.0

Write mode 3.4 -

Average consumption from V

Erase mode 3.4 -

(1)

AVCO freq = 192 MHz - 300 380

1. Guaranteed by design.

Table 58. Flash memory endurance and data retention

Symbol Parameter Conditions Min

END

RET

1. Guaranteed by characterization results.

2. Cycling performed over the whole temperature range.

Endurance TA = –40 to +105 °C 10 kcycles

1 kcycle

Data retention

10 kcycles

(2)

at TA = 85 °C

(2)

at TA = 105 °C 15

(2)

at TA = 125 °C 7

(2)

at TA = 55 °C 30

(2)

at TA = 85 °C 15

(2)

at TA = 105 °C 10

(1)

Unit

Yea rs

92/121 DS13258 Rev 1

STM32WB15CC Electrical characteristics

6.3.13 EMC characteristics

Susceptibility tests are performed on a sample basis during device characterization.

Functional EMS (electromagnetic susceptibility)

While a simple application is executed on the device (toggling two LEDs through I/O ports). the device is stressed by two electromagnetic events until a failure occurs. The failure is indicated by the LEDs:

 Electrostatic discharge (ESD) (positive and negative) is applied to all device pins until

a functional disturbance occurs. This test is compliant with the IEC 61000-4-2 standard.

 FTB: a burst of fast transient voltage (positive and negative) is applied to V

through a 100 pF capacitor, until a functional disturbance occurs. This test is compliant with the IEC 61000-4-4 standard.

A device reset allows normal operations to be resumed.

The test results are given in Tab le 59. They are based on the EMS levels and classes defined in application note AN1709 “EMC design guide for STM8, STM32 and Legacy MCUs”, available on www.st.com.

Symbol Parameter Conditions Level/Class

Table 59. EMS characteristics

and VSS

= 3.3 V, TA = +25 °C, 

FESD

EFTB

Voltage limits to be applied on any I/O pin to induce a functional disturbance

Fast transient voltage burst limits to be applied through 100 pF on VDD and V pins to induce a functional disturbance

= 64 MHz,

HCLK

conforming to IEC 61000-4-2

VDD = 3.3 V, TA = +25 °C,  f

= 64 MHz,

HCLK

conforming to IEC 61000-4-4

Designing hardened software to avoid noise problems

EMC characterization and optimization are performed at component level with a typical application environment and simplified MCU software. It should be noted that good EMC performance is highly dependent on the user application and the software in particular.

Therefore it is recommended that the user applies EMC software optimization and prequalification tests in relation with the EMC level requested for his application.

Software recommendations

The software flow must include the management of runaway conditions such as:

 corrupted program counter

 unexpected reset

 critical data corruption (e.g. control registers)

Prequalification trials

Most of the common failures (unexpected reset and program counter corruption) can be reproduced by manually forcing a low state on the NRST pin or the Oscillator pins for 1

second.

To complete these trials, ESD stress can be applied directly on the device, over the range of specification values. When unexpected behavior is detected, the software can be hardened

DS13258 Rev 1 93/121

113

Electrical characteristics STM32WB15CC

to prevent unrecoverable errors occurring (see application note AN1015, available on

www.st.com).

Electromagnetic interference (EMI)

The electromagnetic field emitted by the device are monitored while a simple application is executed (toggling two LEDs through the I/O ports). This emission test is compliant with the IEC

61967-2 standard, which specifies the test board and the pin loading.

Symbol Parameter Conditions

Table 60. EMI characteristics

Monitored

frequency band

0.1 MHz to 30 MHz 4

Peripheral ON

/ f

HSE

CPUM4, fCPUM0

32 MHz / 64 MHz, 32 MHz

]

Unit

VDD = 3.6 V, TA = 25 °C,

EMI

Peak level

UFQFPN48 package compliant with IEC 61967-2

30 MHz to 130 MHz 8

130 MHz to 1 GHz 0

1 GHz to 2 GHz 9

EMI level 1.5 -

6.3.14 Electrical sensitivity characteristics

Based on three different tests (ESD, LU) using specific measurement methods, the device is stressed to determine its performance in terms of electrical sensitivity.

Electrostatic discharge (ESD)

Electrostatic discharges (a positive then a negative pulse separated by 1 second) are applied to the pins of each sample according to each pin combination. The sample size depends on the number of supply pins in the device (3 parts × (n+1) supply pins). This test conforms to the ANSI/JEDEC standard.

Symbol Ratings Conditions Class Maximum value

ESD(HBM)

ESD(CDM)

1. Guaranteed by characterization results.

Electrostatic discharge voltage (human body model)

Electrostatic discharge voltage (charge device model)

Table 61. ESD absolute maximum ratings

TA = +25 °C, conforming to ANSI/ESDA/JEDEC JS-001

TA = +25 °C, conforming to ANSI/ESD STM5.3.1 JS-002

C2a 500

2 2000 V

(1)

dBµV

Unit

Static latch-up

Two complementary static tests are required on six parts to assess the latch-up performance:

 a supply overvoltage is applied to each power supply pin

 a current injection is applied to each input, output and configurable I/O pin.

These tests are compliant with EIA/JESD 78A IC latch-up standard.

94/121 DS13258 Rev 1

STM32WB15CC Electrical characteristics

Symbol Parameter Conditions Class

LU Static latch-up class T

Table 62. Electrical sensitivity

= +105 °C conforming to JESD78A II

6.3.15 I/O current injection characteristics

As a general rule, current injection to the I/O pins, due to external voltage below VSS or above V operation. However, in order to give an indication of the robustness of the microcontroller in cases when abnormal injection accidentally happens, susceptibility tests are performed on a sample basis during device characterization.

Functional susceptibility to I/O current injection

While a simple application is executed on the device, the device is stressed by injecting current into the I/O pins programmed in floating input mode. While current is injected into the I/O pin, one at a time, the device is checked for functional failures.

The failure is indicated by an out of range parameter: ADC error above a certain limit (higher than 5 LSB TUE), out of conventional limits of induced leakage current on adjacent pins (out of the -5 oscillator frequency deviation).

The characterization results are shown in Tab le 63.

(for standard, 3.3 V-capable I/O pins) should be avoided during normal product

µA / 0 µA range) or other functional failure (for example reset occurrence or

Negative induced leakage current is caused by negative injection and positive induced leakage current is caused by positive injection.

Symbol Description

INJ

1. Guaranteed by characterization results.

2. Injection not possible.

Injected

current

Table 63. I/O current injection susceptibility

All pins except AT0, AT1, PB0 and PB1 -5 N/A

AT0, AT1, PB0 and PB1 pins 0 0

6.3.16 I/O port characteristics

General input/output characteristics

Unless otherwise specified, the parameters given in Tab le 64 are derived from tests performed under the conditions summarized in Table 21: General operating conditions. All I/Os are designed as CMOS- and TTL-compliant.

(1)

Functional susceptibility

Negative

injection

Positive injection

(2)

Unit

DS13258 Rev 1 95/121

113

Electrical characteristics STM32WB15CC

Table 64. I/O static characteristics

Symbol Parameter Conditions Min Typ Max Unit

I/O input low level voltage

I/O input high level voltage

(1)

(2)

(1)

1.71 V < VDD < 3.6 V

(2)

0.49 x V

- - 0.3 x V

0.7 x V

+ 0.26 - -

0.39 x V

- 0.06

TT, FT_xxx

hys

and NRST I/O

- 200 - mV

input hysteresis

0  V

 Max(V

Max(V Max(V

Max(V

lkg

FT_xx input leakage current

5.5 V

 Max(V

(1)

DDXXX

Max(V

VIN = V

) + 3.6 V].

TT input leakage current

1. Tested in production.

2. Guaranteed by design, not tested in production.

3. Represents the pad leakage of the I/O itself. The total product pad leakage is given by I

4. Max(V

5. V

6. Refer to Figure 19: I/O input characteristics.

7. To sustain a voltage higher than min(V FT_xx IO except PC3.

Weak pull-up

equivalent resistor

Weak pull-down

equivalent resistor

I/O pin capacitance - - 5 - pF

Total_Ileak_max

must be lower than [Max(V

= 10 A + number of I/Os where VIN is applied on the pad x I

) is the maximum value among all the I/O supplies.

DDXXX

)  VIN 

DDXXX

) +1 V

DDXXX

) +1 V < VIN 

DDXXX

(2)(3)(4)(5)(6)

DDXXX

)  VIN < 3.6 V

DDXXX

, V

) + 0.3 V, the internal pull-up and pull-down resistors must be disabled. All

DDA

DDXXX

(2)(3)(4)

(3)

)

(3)

)

- - ±100

--650

--200

(7)

- - ±150

(3)

- - 2000

25 40 55

lkg(Max)

k

96/121 DS13258 Rev 1

STM32WB15CC Electrical characteristics

0.5

1.5

2.5

1.5 2 2.5 3 3.5

Voltage

Vil-Vih (all IO except BOOT0)

cmos vil spec 30%

cmos vih spec 70%

ttl vil spec ttl

ttl vih spec ttl

datasheet Vil_rule

datasheet Vih_rule

TTL requirement Vih min = 2V

TTL requirement Vil min = 0.8V

All I/Os are CMOS- and TTL-compliant (no software configuration required). Their characteristics cover more than the strict CMOS-technology or TTL parameters, as shown in

Figure 19 .

Figure 19. I/O input characteristics

Output driving current

The GPIOs (general purpose input/outputs) can sink or source up to ±8 mA, and sink or source up to ± 20

In the user application, the number of I/O pins that can drive current must be limited to respect the absolute maximum rating specified in

 The sum of the currents sourced by all the I/Os on VDD, plus the maximum

consumption of the MCU sourced on V I

(see Table 17: Voltage characteristics).

VDD

 The sum of the currents sunk by all the I/Os on V

the MCU sunk on V

Table 17: Voltage characteristics).

Output voltage levels

Unless otherwise specified, the parameters given in the table below are derived from tests performed under the ambient temperature and supply voltage conditions summarized in

Tab l e 21: General operating conditions. All I/Os are CMOS- and TTL-compliant (FT or TT

unless otherwise specified).

mA (with a relaxed V

, cannot exceed the absolute maximum rating I

DS13258 Rev 1 97/121

/ VOH).

Section 6.2.

cannot exceed the absolute maximum rating

DD,

, plus the maximum consumption of

VSS

(see

113

Electrical characteristics STM32WB15CC

Table 65. Output voltage characteristics

(1)

Symbol Parameter Conditions Min Max Unit

(3)



= 20 mA

= 4 mA  1.71 V

= 20 mA

= 10 mA

(3)



-0.4

- 0.4 -

-0.4

-1.3

- 1.3 -

-0.4

- 0.45 -

-0.4

(2)

OLFM+

Output low level voltage for an I/O pin CMOS port

(2)

Output high level voltage for an I/O pin V

(2)

Output low level voltage for an I/O pin TTL port

(2)

Output high level voltage for an I/O pin 2.4 -

(2)

Output low level voltage for an I/O pin

(2)

Output high level voltage for an I/O pin V

(2)

Output low level voltage for an I/O pin

(2)

Output high level voltage for an I/O pin V

Output low level voltage for an FT I/O pin

(2)

in FM+ mode (FT I/O with “f” option)

|IIO| = 8 mA VDD  2.7 V

IO|

VDD  2.7 V

IO|

VDD  2.7 V

IO|

VDD  1.71 V

1. The IIO current sourced or sunk by the device must always respect the absolute maximum rating specified in Table 17: Voltage characteristics, and the sum of the currents sourced or sunk by all the I/Os (I/O ports and control pins) must always respect the absolute maximum ratings  IIO.

2. Guaranteed by design.

3. TTL and CMOS outputs are compatible with JEDEC standards JESD36 and JESD52.

Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Tabl e 66.

Unless otherwise specified, the parameters given are derived from tests performed under the ambient temperature and supply voltage conditions summarized in

operating conditions.

Table 66. I/O AC characteristics

Speed Symbol Parameter Conditions Min Max Unit

C = 50 pF, 2.7 V  V

C = 50 pF, 1.71 V  V

Fmax Maximum frequency

C=10 pF, 2.7 V  V

C=10 pF, 1.71 V  V

C = 50 pF, 2.7 V  V

C = 50 pF, 1.71 V  V

Tr/Tf Output rise and fall time

C = 10 pF, 2.7 V  V

C = 10 pF, 1.71 V  V

(1)(2)

 3.6 V - 5

 2.7 V - 1

 3.6 V - 10

 2.7 V - 1.5

 3.6 V - 25

 2.7 V - 52

 3.6 V - 17

 2.7 V - 37

Tab l e 21: General

MHz

98/121 DS13258 Rev 1

STM32WB15CC Electrical characteristics

Table 66. I/O AC characteristics

(1)(2)

(continued)

Speed Symbol Parameter Conditions Min Max Unit

C = 50 pF, 2.7 V  V

C = 50 pF, 1.71 V  V

Fmax Maximum frequency

C = 10 pF, 2.7 V  V

C = 10 pF, 1.71 V  V

C = 50 pF, 2.7 V  V

C = 50 pF, 1.71 V  V

Tr/Tf Output rise and fall time

C = 10 pF, 2.7 V  V

C = 10 pF, 1.71 V  V

C = 50 pF, 2.7 V  V

C = 50 pF, 1.71 V  V

Fmax Maximum frequency

C = 10 pF, 2.7 V  V

C = 10 pF, 1.71 V  V

C = 50 pF, 2.7 V  V

C = 50 pF, 1.71 V  V

Tr/Tf Output rise and fall time

C = 10 pF, 2.7 V  V

C = 10 pF, 1.71 V  V

C = 30 pF, 2.7 V  V

C = 30 pF, 1.71 V  V

Fmax Maximum frequency

C = 10 pF, 2.7 V  V

C = 10 pF, 1.71 V  V

C = 30 pF, 2.7 V  V

C = 30 pF, 1.71 V  V

Tr/Tf Output rise and fall time

C = 10 pF, 2.7 V  V

C = 10 pF, 1.71 V  V

1. The maximum frequency is defined with (Tr+ Tf)  2/3 T, and Duty cycle comprised between 45 and 55%.

2. The fall and rise time are defined, respectively, between 90 and 10%, and between 10 and 90% of the output waveform.

3. This value represents the I/O capability but the maximum system frequency is limited to 64 MHz.

 3.6 V - 25

 2.7 V - 10

 3.6 V - 50

 2.7 V - 15

 3.6 V - 9

 2.7 V - 16

 3.6 V - 4.5

 2.7 V - 9

 3.6 V - 50

 2.7 V - 25

 3.6 V - 100

 2.7 V - 37.5

 3.6 V - 5.8

 2.7 V - 11

 3.6 V - 2.5

 2.7 V - 5

 3.6 V - 120

 2.7 V - 50

 3.6 V - 180

 2.7 V - 75

 3.6 V - 3.3

 2.7 V - 6

 3.6 V - 1.7

 2.7 V - 3.3

(3)

MHz

6.3.17 NRST pin characteristics

The NRST pin input driver uses the CMOS technology. It is connected to a permanent  pull-up resistor, RPU.

Unless otherwise specified, the parameters given in the table below are derived from tests performed under the ambient temperature and supply voltage conditions summarized in

Tab l e 21: General operating conditions.

DS13258 Rev 1 99/121

113

Electrical characteristics STM32WB15CC

MS19878V3

Internal reset

External

reset circuit

(1)

NRST

(2)

Filter

0.1 μF

Table 67. NRST pin characteristics

(1)

Symbol Parameter Conditions Min Typ Max Unit

IL(NRST)

IH(NRST)

hys(NRST)

F(NRST)

NF(NRST)

1. Guaranteed by design.

2. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution to the series resistance is minimal (~10%)

NRST input low level voltage

NRST input high level voltage

NRST Schmitt trigger voltage hysteresis

Weak pull-up equivalent resistor

NRST input filtered pulse

NRST input not filtered pulse

(2)

VIN = V

1.71 V  V

- - - 0.3 x V

- 0.7 x V

--200-mV

25 40 55 k

---70

 3.6 V 350 - -

Figure 20. Recommended NRST pin protection

1. The reset network protects the device against parasitic resets.

2. The user must ensure that the level on the NRST pin can go below the V

Table 67, otherwise the reset is not taken into account by the device.

3. The external capacitor on NRST must be placed as close as possible to the device.

100/121 DS13258 Rev 1

max level specified in

IL(NRST)

STMicroelectronics STM32WB15CC Datasheet

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Introduction

2 Description

Table 1. STM32WB15CC device features and peripheral counts

Figure 1. STM32WB15CC block diagram

3 Functional overview

3.1 Architecture

3.2 Arm® Cortex®-M4 core with FPU

3.3 Memories

3.3.1 Adaptive real-time memory accelerator (ART Accelerator)

3.3.2 Memory protection unit

3.3.3 Embedded Flash memory

Table 2. Access status vs. readout protection level and execution modes

3.3.4 Embedded SRAM

3.4 Security and safety

3.5 Boot modes and FW update

3.6 RF subsystem

3.6.1 RF front-end block diagram

Figure 2. STM32WB15CC RF front-end block diagram

3.6.2 BLE general description

3.6.3 RF pin description

Table 3. RF pin list

3.6.4 Typical RF application schematic

Figure 3. External components for the RF part

Table 4. Typical external components

3.7 Power supply management

3.7.1 Power supply distribution

Figure 4. Power distribution

Table 5. Power supply typical components

3.7.2 Power supply schemes

Figure 5. Power-up/down sequence

Figure 6. Power supply overview

3.7.3 Linear voltage regulator

3.7.4 Power supply supervisor

3.7.5 Low-power modes

Table 7. STM32WB15CC modes overview

3.7.6 Reset mode

3.8 VBAT operation

3.9 Interconnect matrix

3.10 Clocks and startup

Figure 7. Clock tree

3.11 General-purpose inputs/outputs (GPIOs)

3.12 Direct memory access controller (DMA)

Table 9. DMA implementation

3.13 Interrupts and events

3.13.1 Nested vectored interrupt controller (NVIC)

3.13.2 Extended interrupts and events controller (EXTI)

3.14 Analog to digital converter (ADC)

3.14.1 Temperature sensor

Table 10. Temperature sensor calibration values

Table 11. Internal voltage reference calibration values

3.15 Comparator (COMP)

3.16 Touch sensing controller (TSC)

3.17 True random number generator (RNG)

3.18 Timers and watchdogs

Table 12. Timer features

3.18.1 Advanced-control timer (TIM1)

3.18.2 General-purpose timer (TIM2)

3.18.3 Low-power timer (LPTIM1 and LPTIM2)

3.18.4 Independent watchdog (IWDG)

3.18.5 System window watchdog (WWDG)

3.18.6 SysTick timer

3.19 Real-time clock (RTC) and backup registers

3.20 Inter-integrated circuit interface (I2C)

Table 13. I2C implementation

3.21 Universal synchronous/asynchronous receiver transmitter (USART)

3.22 Low-power universal asynchronous receiver transmitter (LPUART)

3.23 Serial peripheral interface (SPI1)

3.24 Development support

3.24.1 Serial wire JTAG debug port (SWJ-DP)

4 Pinouts and pin description

Table 14. Legend/abbreviations used in the pinout table

5 Memory mapping

6 Electrical characteristics

6.1 Parameter conditions

6.1.1 Minimum and maximum values

6.1.2 Typical values