STMicroelectronics STM32L4R9AI MCU User Manual

UM2248

User manual

Evaluation board with STM32L4R9AI MCU

Introduction

The STM32L4R9I-EVAL board is designed as a complete demonstration and development platform for the STMicroelectronics Arm® Cortex®-M4 core-based STM32L4R9AI microcontroller with four I²C buses, three SPI and six USART ports, CAN port, two SAI ports, 12-bit ADC, 12-bit DAC, internal 640-Kbyte SRAM and 2-Mbyte Flash memory, two Octo-SPI memory interfaces, touch-sensing capability, USB OTG FS port, LCD-TFT controller, MIPI® DSI host controller, flexible memory controller (FMC), 8- to 14-bit camera interface and JTAG debugging support.

The STM32L4R9I-EVAL, shown in Figure 3, Figure 4, and Figure 5, is used as a reference design for user application development before porting to the final product.

The full range of hardware features on the board helps the user to evaluate all the peripherals (USB, USART, digital microphones, ADC and DAC, TFT LCD, MIPI DSISM display, LDR, SRAM, NOR Flash memory device, Octo-SPI Flash memory device, microSD™ card, sigma-delta modulators, CAN transceiver, EEPROM) and develop applications. Extension headers allow easy connection of a daughterboard or wrapping board for a specific application.

An ST-LINK/V2-1 is integrated on the board, as the embedded in-circuit debugger and programmer for the STM32 MCU and the USB virtual COM port bridge.

September 2020

UM2248 Rev 4

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www.st.com

Contents	UM2248

Contents

1	Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 8
2	Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		9
	2.1	Codification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9
3	Development environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		10
	3.1	System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
	3.2	Development toolchains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
	3.3	Demonstration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
4	Delivery recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		10
5	Technology partners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		10
6	Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . .		11
	6.1	STM32L4R9I-EVAL board views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	13
	6.2	Mechanical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	16
	6.3	ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	17

6.3.1 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6.3.2 ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.4	ETM trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		18
6.5	Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		19
	6.5.1	Supplying the board through ST-LINK/V2-1 USB port . . . . . . . . . . . . . .	20
	6.5.2	Using ST-LINK/2-1 along with powering through the CN18 power jack	20
6.6	Clock references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		22
6.7	Reset sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		23
6.8	Boot option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		23
	6.8.1	Bootloader limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	24
6.9	Audio .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	25
	6.9.1	Digital microphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	25
	6.9.2	Headphones outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	26
	6.9.3	Limitations in using audio features . . . . . . . . . . . . . . . . . . . . . . . . . . . .	26
6.10	USB OTG FS port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		26

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6.10.1 STM32L4R9I-EVAL used as a USB device . . . . . . . . . . . . . . . . . . . . . . 26 6.10.2 STM32L4R9I-EVAL used as a USB host . . . . . . . . . . . . . . . . . . . . . . . . 27 6.10.3 Limitations in using USB OTG FS port . . . . . . . . . . . . . . . . . . . . . . . . . 27 6.10.4 Operating voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.11 RS232 port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.11.1 Operating voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.12 microSD™ card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.12.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 6.12.2 Operating voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.13 Motor control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

28

6.13.1 Board modifications to enable motor control . . . . . . . . . . . . . . . . . . . . . 30 6.13.2 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.14 CAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

6.14.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 6.14.2 Operating voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

6.15 Extension connectors CN5, CN6, CN13, and CN14 . . . . . . . . . . . . . . . . 34 6.16 User LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 6.17 Physical input devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

6.17.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

6.18 Operational amplifier and comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

6.18.1 Operational amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 6.18.2 Comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 6.18.3 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.19 Analog input, output, VREF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 6.20 SRAM device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.20.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 6.20.2 Operating voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6.21 NOR Flash memory device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6.21.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 6.21.2 Operating voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.22 EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.22.1 Operating voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.23 EXT_I2C connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 6.24 Octo-SPI Flash memory device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.24.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

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6.24.2 Operating voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.25 Octo-SPI DRAM device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.25.1 Operating voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 6.25.2 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.26 Touch-sensing button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.26.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.27 MFX MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 6.28 IDD measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 6.29 DSI display (MIPI) connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

6.29.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.30 TFT LCD (RGB and FMC mode) connector . . . . . . . . . . . . . . . . . . . . . . . 45

6.30.1 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

6.31 PMOD connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 6.32 MB1314 DSI display board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 6.33 MB1315 TFT LCD board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

7	Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		49
	7.1	CN1 motor-control connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	49
	7.2	CN2 external I2C connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	50
	7.3	CN3 USB OTG FS Micro-AB connector . . . . . . . . . . . . . . . . . . . . . . . . . .	50
	7.4	CN4 analog input-output connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	51
	7.5	CN5, CN6, CN13, and CN14 extension connectors . . . . . . . . . . . . . . . . .	51
	7.6	CN7 RS232 connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	57
	7.7	CN8 microSD™ connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	57
	7.8	CN9 MFX programming connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	58
	7.9	CN11 STDC14 connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	58
	7.10	CN12 trace debugging connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	59
	7.11	CN15 TAG connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	59
	7.12	CN16 DSI display connector (MIPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	60
	7.13	CN17 JTAG connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	60
	7.14	CN18 power connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	61
	7.15	CN19 ST-LINK/V2-1 programming connector . . . . . . . . . . . . . . . . . . . . .	61
	7.16	CN20 TFT LCD connector (RGB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	61
	7.17	CN21 ST-LINK/V2-1 USB Micro-B connector . . . . . . . . . . . . . . . . . . . . .	61

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	7.18	CN22 CAN D-type male connector . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . 62
Appendix A		I/O assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . 63
8	STM32L4R9I-EVAL board information . . . . . . . . . . . . . . . . . . . . . .		. . . . 69
	8.1	Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . 69
	8.2	Board revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . 70
	8.3	Board known limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . 70

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

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List of tables	UM2248

List of tables

Table 1. Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 2. Codification explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 3. Setting of configuration elements for CN12 trace connector . . . . . . . . . . . . . . . . . . . . . . . 19 Table 4. Power supply related jumpers settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Table 5. X1 crystal related solder bridge settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Table 6. X2 crystal related solder bridge settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Table 7. Boot selection switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Table 8. Digital microphone-related jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Table 9. Motor-control terminal and function assignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Table 10. CAN related jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Table 11. Port assignment for control of physical input devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Table 12. Configuration elements related to OpAmp1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Table 13. Configuration elements related to Comp2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Table 14. SRAM chip select configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Table 15. NOR Flash memory-related jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Table 16. Configuration elements related to Octo-SPI Flash device . . . . . . . . . . . . . . . . . . . . . . . . . 39 Table 17. Touch-sensing-related configuration elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Table 18. MFX signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Table 19. IDD measurement related jumper setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Table 20. CN16 DSI display module connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Table 21. CN20 TFT LCD module connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Table 22. P1 PMOD connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Table 23. Pin function description of the CN1 MB1314 board connector . . . . . . . . . . . . . . . . . . . . . . 46 Table 24. Pin function description of the CN1 MB1315 board connector . . . . . . . . . . . . . . . . . . . . . . 48 Table 25. CN1 motor-control connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Table 26. CN2 EXT_I2C connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Table 27. CN3 USB OTG FS Micro-AB connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Table 28. CN4 analog input-output connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Table 29. CN5 daughterboard extension connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Table 30. CN6 daughterboard extension connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Table 31. CN13 daughterboard extension connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Table 32. CN14 daughterboard extension connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Table 33. RS232 D-sub male connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Table 34. CN8 microSD™ connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Table 35. CN11 STDC14 debugging connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Table 36. CN12 trace debugging connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Table 37. CN15 TAG debugging connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Table 38. CN17 JTAG/SWD debugging connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Table 39. CN21 USB Micro-B connector (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Table 40. CN22 CAN D-type 9-pin male connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Table 41. STM32L4R9I-EVAL I/O assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Table 42. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

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UM2248	List of figures

List of figures

Figure 1. STM32L4R9I-EVAL hardware block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 2. STM32L4R9I-EVAL board (top side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 3. STM32L4R9I-EVAL board (top view) with round DSI display MB1314 daughterboard . . . 13 Figure 4. STM32L4R9I-EVAL board (top view) with TFT LCD MB1315 daughterboard . . . . . . . . . . 14 Figure 5. STM32L4R9I-EVAL board (bottom view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 6. MB1313 STM32L4R9I-EVAL board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 7. MB1314 DSI display daughterboard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 8. USB composite device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 9. PCB top-side rework for motor control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Figure 10. PCB bottom-side rework for motor control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Figure 11. CN1 motor-control connector (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Figure 12. CN2 EXT_I2C connector (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Figure 13. CN3 USB OTG FS Micro-AB connector (front view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Figure 14. CN4 analog input-output connector (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Figure 15. RS232 D-sub male connector (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Figure 16. CN8 microSD™ connector (top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Figure 17. CN11 STDC14 debugging connector (top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Figure 18. CN12 ETM trace debugging connector (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Figure 19. CN17 JTAG/SWD debugging connector (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Figure 20. CN18 power-supply connector (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Figure 21. CN21 USB Micro-B connector (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Figure 22. CN22 CAN D-type 9-pin male connector (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

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Features	UM2248

1Features

•STM32L4R9AII6 Arm®(a)-based microcontroller with 2 Mbytes of Flash memory and 640 Kbytes of RAM in a UFBGA169 package

•1.2” 390x390 pixels MIPI DSISM round LCD

•4.3” 480x272 pixels TFT LCD with RGB mode

•Two ST-MEMS digital microphones

•8-Gbyte microSD™ card bundled

•16-Mbit (1 M x 16 bit) SRAM device

•128-Mbit (8 M x 16 bit) NOR Flash memory device

•512-Mbit Octo-SPI Flash memory device with double transfer rate (DTR) support

•64-Mbit Octo-SPI SRAM memory device with HyperBus interface support

•EEPROM supporting 1 MHz I²C-bus communication speed

•Reset and wake-up/tamper buttons

•Joystick with four-way controller and selector

•Touch-sensing button

•Light-dependent resistor (LDR)

•Potentiometer

•Coin battery cell for power backup

•Board connectors:

–Two jack outputs for a stereo audio headphone with independent content

–Slot for microSD™ card supporting SD and SDHC

–TFT LCD standard connector

–MIPI DSISM display standard connector

–EXT_I2C connector supports I²C bus

–RS-232 port configurable for communication or MCU flashing

–USB OTG FS Micro-AB port

–CAN 2.0A/B-compliant port

–Connector for ADC input and DAC output

–JTAG/SWD connector

–ETM trace debug connector

–User interface through USB virtual COM port

–Embedded ST-LINK/V2-1 debug and flashing facility

–TAG connector

–STDC14 connector

–PMOD connector

–Extension connector for the daughterboard

–Motor-control connector on the daughterboard

•Flexible power-supply options: power jack, ST-LINK/V2-1 USB connector,

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

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UM2248	Ordering information

USB OTG FS connector, daughterboard

•On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability: mass storage, virtual COM port and debug port

•Microcontroller supply voltage: fixed 3.3 V or adjustable range from 1.71 V to 3.6 V

•MCU current consumption measurement circuit

•Access to the comparator and operational amplifier of STM32L4R9AII6

•Comprehensive free software libraries and examples available with the STM32Cube package

•Support of a wide choice of integrated development environments (IDEs) including IAR Embedded Workbench®, MDK-ARM, and STM32CubeIDE

2 Ordering information

To order the STM32L4R9I-EVAL Evaluation board, refer to Table 1. Additional information is available from the datasheet and reference manual of the target STM32.

Table 1. Ordering information

	Order code	Board	Targeted STM32
		reference
		– MB1313
	STM32L4R9I-EVAL	– MB1314(1)	STM32L4R9AII6
		– MB1315(2)

1.DSI display daughterboard

2.TFT LCD daughterboard

2.1Codification

The meaning of the codification is explained in Table 2.

Table 2. Codification explanation

STM32XXYY-EVAL

Description

Example: STM32L4R9I-EVAL

	XX	MCU series in STM32 Arm	STM32L4 Series
		Cortex MCUs
	YY	STM32 product line in the	STM32L4R9
		series
	I	STM32 Flash memory size:	2 Mbytes
		– I for 2 Mbytes

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Development environment	UM2248

3 Development environment

3.1System requirements

•Windows® OS (7, 8, and 10), Linux® 64-bit, or macOS®(a)

•USB Type-A or USB Type-C® to Micro-B cable

3.2Development toolchains

•IAR Systems - IAR Embedded Workbench®(b)

•Keil® - MDK-ARM(b)

•STMicroelectronics - STM32CubeIDE

3.3Demonstration software

The demonstration software, included in the STM32Cube MCU Package corresponding to the on-board microcontroller, is preloaded in the STM32 Flash memory for easy demonstration of the device peripherals in standalone mode. The latest versions of the demonstration source code and associated documentation can be downloaded from www.st.com.

4 Delivery recommendations

Before the first use, make sure that no damage occurred to the boards during shipment and no socketed components are loosen in their sockets or fallen into the plastic bag.

In particular, pay attention to the following components:

1.microSD™ card in its CN8 receptacle

2.DSI display MB1314 daughterboard in its CN16 connector

For product information related to the STM32L4R9AII6 microcontroller, visit www.st.com website.

5 Technology partners

MACRONIX: 512-Mbit Octo-SPI Flash, part number MX25LM51245GXDI00

a.macOS® is a trademark of Apple Inc. registered in the U.S. and other countries.

b.On Windows only

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UM2248	Hardware layout and configuration

6 Hardware layout and configuration

The STM32L4R9I-EVAL board is designed around the STM32L4R9AII6 target microcontroller in a UFBGA 169-pin package. Figure 1 illustrates the STM32L4R9AII6 connections with peripheral components. Figure 2 shows the location of the main components on the Evaluation board. Figure 3, Figure 4, and Figure 5 are the three images showing the

STM32L4R9I-EVAL board top view with round DSI display, top view with TFT LCD, and bottom view.

Figure 1. STM32L4R9I-EVAL hardware block diagram

3.3 V

1.8 V

VDD ADJ

power supply

power supply

power supply

3 V battery

VBAT

DFSDM

MEMs

32 KHz crystal

RTC

SAI1

Audio codec

MIPI DSI

DSI LCD connector

Octo SPI Flash

Octo SPI1

RGB

TFT LCD connector

Octo SPI SRAM

Octo SPI2

FMC

NOR Flash

microSD card

SDIO1

SRAM/PSRAM

USB connector

OTG FS

I2C2

EEPROM

One TS PAD

TSC

EXT_I2C connector

RS232 connector

LPUSART1

ADC/DAC

ADC/DAC connector

PMOD connector

SPI2

OPAMP1

Potentiometer/LDR

CAN connector

CAN

COMP2

ST-LINK/V2-1

UART3

Joystick/buttons

JTAG/SWD connector

DAP

LEDs

GPIO

TAG connector

Motor control

connector

Trace connector

STM32L4R9AII6

UFBGA169

STDC14 connector

MSv46034V2

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Hardware layout and configuration	UM2248

Figure 2. STM32L4R9I-EVAL board (top side)

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6.1STM32L4R9I-EVAL board views

Figure 3. STM32L4R9I-EVAL board (top view) with round DSI display MB1314 daughterboard

Picture is not contractual

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Figure 4. STM32L4R9I-EVAL board (top view) with TFT LCD MB1315 daughterboard

Picture is not contractual

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Figure 5. STM32L4R9I-EVAL board (bottom view)

Picture is not contractual

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Hardware layout and configuration	UM2248

6.2Mechanical dimensions

Figure 6. MB1313 STM32L4R9I-EVAL board

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Figure 7. MB1314 DSI display daughterboard

6.3ST-LINK/V2-1

ST-LINK/V2-1 facility for debugging and flashing of the STM32L4R9AII6 is integrated on the STM32L4R9I-EVAL board.

Compared to the ST-LINK/V2 stand-alone tool available from STMicroelectronics, ST- LINK/V2-1 offers new features and drops some others.

New features:

•USB software re-enumeration

•Virtual COM port interface on USB

•Mass storage interface on USB

•USB power management request for more than 100mA power on USB

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Hardware layout and configuration	UM2248

Features dropped:

•SWIM interface

The CN21 USB connector can be used to power STM32L4R9I-EVAL regardless of the ST-LINK/V2-1 facility use for debugging or for flashing STM32L4R9AII6. This holds also when the ST-LINK/V2 stand-alone tool is connected to CN12, CN17, CN11, or CN15 connector and used for debugging or flashing STM32L4R9AII6. Section 6.5 provides more details on powering STM32L4R9I-EVAL.

For full detail on both versions of the debug and flashing tool, the stand-alone ST-LINK/V2 and the embedded ST-LINK/V2-1, refer to www.st.com.

6.3.1Drivers

Before connecting STM32L4R9I-EVAL to a Windows (XP, 7, 8 10) PC via USB, a driver for ST-LINK/V2-1 must be installed. It is available from www.st.com.

In case the STM32L4R9I-EVAL board is connected to the PC before installing the driver, the Windows device manager may report some USB devices found on STM32L4R9I-EVAL as “Unknown”. To recover from this situation, after installing the dedicated driver downloaded from www.st.com, the association of “Unknown” USB devices found on STM32L4R9I-EVAL to this dedicated driver must be updated in the device manager manually. It is recommended to proceed using the USB Composite Device line, as shown in Figure 8.

Figure 8. USB composite device

6.3.2ST-LINK/V2-1 firmware upgrade

For its operation, ST-LINK/V2-1 employs a dedicated MCU with Flash memory. Its firmware determines ST-LINK/V2-1 functionality and performance. The firmware may evolve during the life span of STM32L4R9I-EVAL to include new functionality, fix bugs, or support new target microcontroller families. It is therefore recommended to keep ST-LINK/V2-1 firmware up to date. The latest version is available from www.st.com.

6.4ETM trace

The CN12 connector is available to output trace signals used for debugging. By default, the Evaluation board is configured such that, STM32L4R9AII6 signals PE2, PE5, and PE6 are not connected to trace outputs Trace_CK, Trace_D2, and Trace_D3 of CN12. They are used for other functions.

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UM2248	Hardware layout and configuration

Table 3 shows the setting of configuration elements to shunt PE2, PE5, and PE6 MCU ports to the CN12 connector, to use them as debug trace signals.

Table 3. Setting of configuration elements for CN12 trace connector

Element	Setting	Configuration
	R53 in	Default setting.
R53	SB56 open	PE2 connected to memory address line A23.
SB56	R53 out	PE2 connected to Trace_CK on CN12. A23 pulled down.
	SB56 closed
	R209 in	Default setting.
R209	SB59 open	PE5 connected to memory address line A21.
SB59	R209 out	PE5 connected to Trace_D2 on CN12. A21 pulled down.
	SB59 closed
	R211 in	Default setting.
R211	SB60 open	PE6 connected to memory address line A22.
SB60	R211 out	PE6 connected to Trace_D3 on CN12. A22 pulled down.
	SB60 closed

Warning: Enabling the CN12 trace outputs through hardware modifications described in Table 3 results in reducing the memory address bus width to 20 address lines and so the addressable space to 1 Mword of 16 bits. As a consequence, the onboard SRAM and NOR Flash memory usable capacity is reduced to 16 Mbits.

6.5Power Supply

The STM32L4R9I-EVAL board is designed to be powered from 5 V DC power source. It incorporates a precise polymer Zener diode (Poly-Zen) protecting the board from damage due to the wrong power supply. One of the following four 5 V DC power inputs is usable with an appropriate board configuration:

•Power jack CN18 marked PSU_DC5V on the board. A jumper must be placed in E5V location of JP11. The positive pole is on the center pin as illustrated in Figure 20.

•Micro-B USB receptacle CN21 of ST-LINK/V2-1 provides up to 500mA to the board. Offering enumeration feature described in Section 6.5.1.

•Micro-AB USB receptacle CN3 of USB OTG interface marked USB OTG_FS on the board, supplies up to 500mA to the board.

•Pin 39 of CN5 and Pin 39 of CN6 extension connectors for a custom daughterboard, marked D5V on the board.

No external power supply is provided with the board.

LD7 red LED turns on when the voltage on the power line marked as +5 V is present. All supply lines required for the operation of the components on STM32L4R9I-EVAL are derived from that +5 V line.

Table 4 describes the setting of all jumpers related to powering the STM32L4R9I-EVAL and its extension board. VDD_MCU is STM32L4R9AII6 digital supply voltage line. It is possible to drive the boards with either fixed 3.3 V or with an adjustable voltage regulator controlled by RV3 potentiometer and producing a range of voltages between 1.71 V and 3.6 V.

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6.5.1Supplying the board through ST-LINK/V2-1 USB port

To power STM32L4R9I-EVAL in this way, the USB host (a PC) gets connected with the STM32L4R9I-EVAL board’s Micro-B USB receptacle, via a USB cable. This event is the beginning of the USB enumeration procedure. In its initial phase, the host’s USB port current supply capability is limited to 100 mA. It is enough because only the ST-LINK/V2-1 part of STM32L4R9I-EVAL draws power at that time. If the SB33 solder bridge is open, the U22 ST890 power switch is set in the OFF position, which isolates the remainder of STM32L4R9I-EVAL from the power source. In the next phase of the enumeration procedure, the host PC informs the ST-LINK/V2-1 facility of its capability to supply up to 300 mA of current. If the answer is positive, the ST-LINK/V2-1 sets the U22 ST890 switch to ON position to supply power to the remainder of the STM32L4R9I-EVAL board. If the PC USB port is not capable of supplying up to 300 mA of current, the CN18 power jack is available to supply the board.

If a short-circuit occurs on the board, the ST890 power switch protects the USB port of the host PC against a current exceeding 600 mA. In such an event, the LD8 LED lights on.

The STM32L4R9I-EVAL board is also supply-able from a USB power source not supporting enumeration, such as a USB charger, as shown in Table 4. ST-LINK/V2-1 turns the ST890 power switch ON regardless of the enumeration procedure result and passes the power unconditionally to the board.

The LD7 red LED turns on whenever the whole board is powered.

6.5.2Using ST-LINK/2-1 along with powering through the CN18 power jack

If the board requires more than 300 mA of supply current, this cannot be provided by the host PC connected to the ST-LINK/2-1 USB port, used for debugging or flashing STM32L4R9AII6. In such a case, the board is supplied through CN18 (marked PSU_DC5V on the board).

To do this, it is important to power the board before connecting it with the host PC, which requires the following sequence to be respected:

1.Set the jumper in JP11 header in E5V position,

2.Connect the external 5 V power source to CN18,

3.Check the red LED LD7 is turned on,

4.Connect the host PC to the CN12 USB connector.

In case the board requires more than 300 mA and the host PC is connected via USB before the board is powered from CN18, there is a risk of the following events to occur, in the order of severity:

1.The host PC is capable of supplying 300 mA (the enumeration succeeds) but it does not incorporate any over-current protection on its USB port. It is damaged due to overcurrent.

2.The host PC is capable of supplying 300 mA (the enumeration succeeds) and it has built-in over-current protection on its USB port, limiting or shutting down the power out of its USB port when the excessive current requirement from STM32L4R9I-EVAL is detected. This causes an operating failure to STM32L4R9I-EVAL.

3.The host PC is not capable of supplying 300 mA (the enumeration fails) so ST-LINK/V2- 1 does not supply the remainder of STM32L4R9I-EVAL from its USB port VBUS line.

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UM2248	Hardware layout and configuration

Table 4. Power supply related jumpers settings

Jumper /

solder Setting Configuration bridge

STM32L4R9I-EVAL is supplied through the CN18 power

jack (marked PSU_DC5V). CN5 and CN6 extension

U5V

STlk

D5V

connectors do not pass the 5 V of STM32L4R9I-EVAL to the

E5V

daughterboard.

STM32L4R9I-EVAL is supplied through the CN3 Micro-AB

USB connector. CN5 and CN6 extension connectors do not

E5V

STlk

D5V

pass the 5 V of STM32L4R9I-EVAL to the daughterboard.

U5V

JP11

Default setting.

STM32L4R9I-EVAL is supplied through the CN21 Micro-B

Power

USB connector. CN5 and CN6 extension connectors do not

source

E5V

U5V

STlk

D5V

pass the 5 V of STM32L4R9I-EVAL to the daughterboard.

selector

STM32L4R9I-EVAL is supplied through pin 39 of CN5 and

E5V

U5V

STlk

pin 39 of CN6 extension connectors.

D5V

STM32L4R9I-EVAL is supplied through the CN18 power

jack. CN5 and CN6 extension connectors pass the 5 V of

STM32L4R9I-EVAL to the daughterboard. Make sure to

E5V

U5V

STlk

D5V

disconnect from the daughterboard, any power supply that

may generate conflict with the power supply on the CN18

power jack.

1

2

3

Vbat is connected to the battery.

JP8

Vbat

Default setting.

connection

1

2

3

Vbat is connected to VDD.

Default setting.

1

2

3

VDD_MCU (VDD terminals of STM32L4R9AII6) is

JP10

connected to fixed +3.3 V.

VDD_MCU

connection

VDD_MCU is connected to voltage in the range from

1

2

3

+1.71 V to +3.6 V, adjustable with potentiometer RV3.

Default setting.

1

2

3

VDD_USB (VDD USB terminal of STM32L4R9AII6) is

JP1

connected with VDD_MCU.

VDD_USB

connection

1

2

3

VDD_USB is connected to +3.3 V.

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Hardware layout and configuration	UM2248

Table 4. Power supply related jumpers settings (continued)

Jumper /

solder Setting Configuration bridge

										Default setting.
		1			2	3
										VDDA terminal of STM32L4R9AII6 is connected with
JP2
										VDD_MCU.
VDDA
connection
		1			2	3				VDDA terminal of STM32L4R9AII6 is connected to +3.3 V.
										Default setting.
			1			2
										VDD_IO (VDDIO2 terminals of STM32L4R9AII6) is
JP3
										connected with VDD_MCU.
VDD_IO
connection
			1			2				VDD_IO is open.
										Default setting.
SB33		SB33 Off								The CN21 ST-LINK/V2-1 Micro-B USB connector can be
										used to supply power to the STM32L4R9I-EVAL board
Powering
										remainder, depending on the powering capability of the host
through										PC USB port declared in the enumeration.
USB of
										CN21 Micro-B USB connector of ST-LINK/V2-1 supplies
ST-LINK/
V2-1		SB33 On								power to the STM32L4R9I-EVAL board remainder. This is
										the setting for powering the board through CN21 using a
										USB charger)(1).

1.On all ST-LINK/V2-1 boards, the target application is now able to run even if the ST-LINK/V2-1 is either not connected to a USB host, or is powered through a USB charger (or through a not-enumerating USB host).

6.6Clock references

Two clock references are available on STM32L4R9I-EVAL for the STM32L4R9AII6 microcontroller.

•32.768 kHz crystal X1, for embedded RTC

•25 MHz crystal X2, for the main clock generator

The main clock generation is possible via an internal RC oscillator, disconnected by removing resistors R61 and R65 when the internal RC clock is used.

Table 5. X1 crystal related solder bridge settings

	Solder	Setting	Configuration
	bridge
			Default setting.
		Open	PC14 OSC32_IN terminal is not routed to the CN5 extension
	SB50		connector. X1 is used as the clock reference.
			PC14 OSC32_IN is routed to the CN5 extension connector.
		Closed	Resistor R50 must be removed, for the X1 quartz circuit not to
			disturb the clock reference or source on the daughterboard.

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