STI STM32G081B-EVAL User Manual

UM2403

User manual

Evaluation board with STM32G081RB MCU

Introduction

The STM32G081B-EVAL Evaluation board is a high-end development platform for Arm®

®

Cortex
Delivery controller interfaces (UCPD) compliant with USB Type-C r1.2 and USB PD
specification r3.0, two I2Cs, two SPIs, five USARTs, one LP UART, one 12-bit ADC, two
12-bit DACs, two GP comparators, two LP timers, internal 32KB SRAM and 128KB Flash,
CEC, SWD debugging support.

The full range of hardware features on the STM32G081B-EVAL Evaluation board includes
the mother board, the legacy peripheral daughterboard and the USB Type-C and Power
Delivery daughterboard, which help to evaluate all peripherals (USB Type-C connector with
USB PD, motor control connector, RS232, RS485, Audio DAC, microphone ADC, TFT LCD,
IrDA, IR LED, IR receiver, LDR, microSD
slot, RF E2PROM and temperature sensor… etc.) and to develop applications. An ST­LINK/V2-1 is integrated on the board as embedded in-circuit debugger and programmer for
the STM32 MCU

-M0+ core-based STM32G081RBT6 microcontroller with USB Type-C™ and Power

™

card, CEC on two HDMI connectors, smartcard

.

The daughterboard and extension connectors provide an easy way to connect a
daughterboard or wrapping board for your specific application.

The USB Type-C and Power Delivery daughterboard features two independent USB-C ports
controlled by STM32G0. USB-C port 1 is dual role power (DRP) and can provide up-to 45W
of power. USB-C Port 2 is sink only. Both supports USB PD protocol and alternate mode
functionality.

Figure 1. STM32G081B-EVAL board with

legacy peripheral daughterboard

Figure 2. STM32G081B-EVAL board with

UCPD daughterboard

Pictures are not contractual.

November 2018 UM2403 Rev 1 1/78

www.st.com

1

Contents UM2403

Contents

1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2 Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4 Development toolchains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5 Demonstration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

7 Delivery recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

8 Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

8.1 Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8.1.1 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8.1.2 ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8.2 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

8.3 Clock references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

8.4 Reset source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

8.5 Boot Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

8.6 Peripherals on mother board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

8.6.1 Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

8.6.2 RS232 and RS485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

8.6.3 microSD card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

8.6.4 Analog Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

8.6.5 External I2C Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

8.6.6 Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

8.6.7 Display and Input devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

8.7 Peripherals on legacy peripheral daughterboard . . . . . . . . . . . . . . . . . . . 25

8.7.1 LDR (Light dependent resistor) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

8.7.2 Temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

8.7.3 Smartcard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

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8.7.4 HDMI CEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

8.7.5 IR LED and IR receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

8.8 USB Type-C and Power Delivery daughterboard . . . . . . . . . . . . . . . . . . . 27

8.8.1 USB Type-C receptacles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

8.8.2 Power Delivery and local power management . . . . . . . . . . . . . . . . . . . 28

8.8.3 VBUS management and discharge mechanism . . . . . . . . . . . . . . . . . . 28

8.8.4 VBUS voltage-sensing and current-sense stage . . . . . . . . . . . . . . . . . . 29

8.8.5 CC management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

9 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

9.1 Connectors on mother board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

9.1.1 Motor control connector CN1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

9.1.2 External I2C connector CN2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9.1.3 Daughterboard connector CN4 and CN5 . . . . . . . . . . . . . . . . . . . . . . . . 32

9.1.4 ST-LINK/V2-1 USB Micro-B connector CN6 . . . . . . . . . . . . . . . . . . . . . 34

9.1.5 ST-LINK/V2-1 programming connector CN7 . . . . . . . . . . . . . . . . . . . . . 35

9.1.6 microSD connector CN8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

9.1.7 Extension connector CN9 and CN10 . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

9.1.8 RS232 and RS485 connector CN11 . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

9.1.9 Standard SWD connector CN12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

9.1.10 High density SWD connector CN13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

9.1.11 TFT LCD connector CN14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

9.1.12 Audio jack CN15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

9.1.13 5 V Power connector CN16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

9.1.14 Analog input connector CN17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

9.2 Connectors on legacy peripheral daughterboard . . . . . . . . . . . . . . . . . . . 40

9.2.1 HDMI sink connector CN1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

9.2.2 Smartcard connector CN2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

9.2.3 HDMI source connector CN3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

9.2.4 Daughterboard female connector CN4 and CN5 . . . . . . . . . . . . . . . . . . 42

9.3 Connectors on UCPD daughterboard . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

9.3.1 USB Type A connector CN1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

9.3.2 DisplayPort source connector CN2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

9.3.3 19 V Power connector CN3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

9.3.4 USB3.1 Gen1 Type B connector CN4 . . . . . . . . . . . . . . . . . . . . . . . . . . 44

9.3.5 USB Type-C connector PORT2 CN5 . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

9.3.6 Display port sink connector CN6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

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Contents UM2403

9.3.7 USB Type-C connector PORT1 CN7 . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

9.3.8 Daughterboard female connector CN8 and CN9 . . . . . . . . . . . . . . . . . . 46

Appendix A Electrical schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Appendix B STM32G081B-EVAL IO Assignment . . . . . . . . . . . . . . . . . . . . . . . . . 72

Appendix C Federal Communications Commission (FCC) and

Industry Canada (IC) Compliance Statements . . . . . . . . . . . . . . . . 75

C.1 FCC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

C.1.1 Part 15.19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

C.1.2 Part 15.105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

C.1.3 Part 15.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

C.2 IC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

C.2.1 Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

C.3 Déclaration de conformité . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Appendix D Mechanical dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

4/78 UM2403 Rev 1

UM2403 List of tables

List of tables

Table 1. Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 2. Power source related Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 3. Low voltage limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 4. 32 KHz crystal X2 related solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 5. 8 MHz crystal X3 related solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 6. Boot related jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 7. Boot0 related jumpers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 8. Audio related jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 9. RS232 and RS485 related jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 10. RS485 related solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 11. LCD modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 12. Temperature sensor related solder bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 13. Connection between ST8024L and STM32G081RBT6 . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 14. VBUS related jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table 15. Local power related jumpers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table 16. VBUS Power Delivery profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 17. Voltage-sensing and current-sensing ADC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 18. Dead battery related jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 19. Motor control connector CN1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 20. RF E2PROM connector CN2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 21. Daughterboard connector CN4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 22. Daughterboard connector CN5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 23. USB Micro-B connector CN6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 24. microSD connector CN9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 25. Extension connector CN9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 26. Extension connector CN10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 27. RS232 & RS485 connector CN11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 28. Standard SWD debugging connector CN12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Table 29. High density SWD debugging connector CN13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 30. Analog input-output connector CN17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 31. HDMI sink connector CN1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 32. Smartcard connector CN2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 33. HDMI source connector CN3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table 34. USB Type A connector CN1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table 35. DisplayPort source connector CN2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 36. USB3.1 Gen1 Type B connector CN4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Table 37. USB Type-C connector PORT2 CN5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Table 38. DisplayPort sink connector CN6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Table 39. USB Type-C connector PORT1 CN7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Table 40. STM32G081B-EVAL IO Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Table 41. Mechanical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Table 42. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

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List of figures UM2403

List of figures

Figure 1. STM32G081B-EVAL board with legacy peripheral daughterboard . . . . . . . . . . . . . . . . . . . 1

Figure 2. STM32G081B-EVAL board with UCPD daughterboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 3. Hardware block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 4. STM32G081B-EVAL Evaluation board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 5. Legacy peripheral daughterboard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 6. USB Type-C and Power Delivery daughterboard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 7. USB Composite Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 8. 5 V power structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 9. GP comparator 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 10. Motor Control connector CN1 (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 11. I2C EXT connector CN2 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 12. USB Micro-B connector CN6 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 13. microSD connector CN8 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 14. RS232 and RS485 connector CN11 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 15. Standard SWD debugging connector CN12 (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 16. High density SWD debugging connector CN13 (top view) . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 17. Power-supply connector CN16 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 18. Analog input-output connector CN17 (top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 19. HDMI sink connector CN1 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 20. Smartcard connector CN2 (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 21. HDMI source connector CN3 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 22. USB Type A connector CN1 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 23. DisplayPort source connector CN2 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 24. 19 V Power connector CN3 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 25. USB3.1 Gen1 Type B connector CN4 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 26. USB Type-C connector PORT2 CN5 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 27. DisplayPort sink connector CN6 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 28. USB Type-C connector PORT1 CN7 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 29. STM32G081B-EVAL mother board top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 30. STM32G081B-EVAL MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 31. STM32G081B-EVAL power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 32. STM32G081B-EVAL audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 33. STM32G081B-EVAL LCD microSD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 34. STM32G081B-EVAL motor-control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 35. STM32G081B-EVAL peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 36. STM32G081B-EVAL RS232 and RS485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 37. STM32G081B-EVAL extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 38. STM32G081B-EVAL ST-LINK V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Figure 39. STM32G081B-EVAL SWD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Figure 40. STM32G081B-EVAL legacy peripheral daughterboard . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Figure 41. STM32G081B-EVAL legacy peripheral daughterboard HDMI and CEC . . . . . . . . . . . . . . 60

Figure 42. STM32G081B-EVAL legacy peripheral daughterboard Smartcard and IR. . . . . . . . . . . . . 61

Figure 43. STM32G081B-EVAL legacy peripheral daughterboard temperature sensor and LDR. . . . 62

Figure 44. STM32G081B-EVAL UCPD daughterboard top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Figure 45. STM32G081B-EVAL UCPD daughterboard CC and VCONN . . . . . . . . . . . . . . . . . . . . . . 64

Figure 46. STM32G081B-EVAL UCPD daughterboard port1 DP USB3 . . . . . . . . . . . . . . . . . . . . . . . 65

Figure 47. STM32G081B-EVAL UCPD daughterboard Type-C source con . . . . . . . . . . . . . . . . . . . . 66

Figure 48. STM32G081B-EVAL UCPD daughterboard port2 DP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

6/78 UM2403 Rev 1

UM2403 List of figures

Figure 49. STM32G081B-EVAL UCPD daughterboard Type-C sink con . . . . . . . . . . . . . . . . . . . . . . 68

Figure 50. STM32G081B-EVAL UCPD daughterboard USB PD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Figure 51. STM32G081B-EVAL UCPD daughterboard power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Figure 52. STM32G081B-EVAL UCPD daughterboard source power. . . . . . . . . . . . . . . . . . . . . . . . . 71

Figure 53. Mechanical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

UM2403 Rev 1 7/78

7

Features UM2403

1 Features

Mother board

• STM32G081RBT6 Arm
of Flash memory and 32 Kbytes of RAM in LQFP64 package

• MCU voltage choice fixed 3.3 V or adjustable from 1.65 V to 3.6 V

2

• I

C compatible serial interface

• RTC with backup battery

• 8-Gbyte or more SPI interface microSD

• Potentiometer

• 4 color user LEDs and one LED as MCU low-power alarm

• Reset, Tamper and User buttons

• 4-direction control and selection joystick

• Board connectors:

– 5 V power jack
– RS-232 and RS485 communications
– Stereo audio jack including analog microphone input
–microSD™ card
– Extension I

2

– Motor-control connector

• Board extension connectors:
– Daughterboard connectors for legacy peripheral daughterboard or USB Type-C

and Power Delivery daughterboard

– Extension connectors for daughterboard or wire-wrap board

• Flexible power-supply options:
– 5 V power jack
– ST-LINK/V2-1 USB connector
– Daughterboard

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

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

• Support of a wide choice of Integrated Development Environments (IDEs) including
IAR™, Keil

®

, GCC-based IDEs.

®(a)

Cortex®-M0+ core-based microcontroller with 128 Kbytes

C connector

™

card

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

8/78 UM2403 Rev 1

UM2403 Features

Legacy peripheral daughterboard

• IrDA transceiver

• IR LED and IR receiver

• Light dependent resistor (LDR)

• Temperature Sensor

• Board connectors:

– Two HDMI connectors with DDC and CEC
– Smartcard slot

USB Type-C and Power Delivery daughterboard

• Multiplexer for USB3.1 Gen1 / DisplayPort™ input and Type-C port1 output

• Multiplexer for Type-C port2 input and DisplayPort output / USB2.0

• VCONN on Type-C port1

• USB PD on Type-C port1

• Board connectors:

– Type-C port1 DRP (Dual Role Port)
– Type-C port2 sink
– DisplayPort input
– DisplayPort output
– USB 3.1 Gen1 Type-B receptacle
– USB2.0 Type-A receptacle
– 19 V power jack for USB PD

UM2403 Rev 1 9/78

77

Product marking UM2403

2 Product marking

Evaluation tools marked as “ES” or “E” are not yet qualified and are therefore not ready to
be used as reference design or in production. Any consequences arising from such usage
will not be at STMicroelectronics’ charge. In no event will STMicroelectronics be liable for
any customer usage of these engineering sample tools as reference designs or in
production.

‘E’ or ‘ES’ marking examples of location:

• on the targeted STM32 that is soldered on the board (for illustration of STM32 marking,
refer to the section Package information in the STM32 datasheet at www.st.com).

• next to the evaluation tool ordering part number, that is stuck or silkscreen printed on
the board

3 System requirements

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

• USB Type-A to Micro-B cable

4 Development toolchains

• Keil® MDK-ARM

• IAR™ EWARM

• GCC-based IDEs

(b)

(b)

5 Demonstration software

The demonstration software, included in the STM32Cube MCU Package corresponding to
the on-board MCU, 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 the

®(a)

www.st.com web page.

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

b. On Windows only

10/78 UM2403 Rev 1

UM2403 Ordering information

6 Ordering information

To order the STM32G081B-EVAL Evaluation board, refer to Tab le 1.

Order code Target STM32

STM32G081B-EVAL STM32G081RB

Table 1. Ordering information

7 Delivery recommendations

Some verifications are needed before using the board for the first time, to make sure that no
damage occurred during shipment and that no components are unplugged or lost.

When the board is extracted from its plastic bag, check that no component remains in the
bag. The main component to verify is microSD card which may have been ejected from the
connector CN8 (right side of the board).

Caution: There is an explosion risk if the battery is replaced by an incorrect one. Make sure to

dispose of used batteries according to the instructions.

UM2403 Rev 1 11/78

77

Hardware layout and configuration UM2403

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8 Hardware layout and configuration

The STM32G081B-EVAL Evaluation board is designed around the STM32G081RBT6 (64­pin LQFP package). The hardware block diagram
between STM32G081RBT6 and peripherals (motor control connector, RS232, RS485,
Audio DAC, microphone ADC, TFT LCD, CAN, IrDA, IR LED, IR receiver, LDR, MicroSD
card, CEC on two HDMI connectors, Smartcard slot, Temperature sensor… etc.) and

Figure 4 help users to locate these features on the Evaluation board.

Figure 3. Hardware block diagram

Figure 3 illustrates the connection

12/78 UM2403 Rev 1

UM2403 Hardware layout and configuration

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UM2403 Rev 1 13/78

77

Hardware layout and configuration UM2403

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Figure 6. USB Type-C and Power Delivery daughterboard

14/78 UM2403 Rev 1

UM2403 Hardware layout and configuration

8.1 Embedded ST-LINK/V2-1

The ST-LINK/V2-1 programming and debugging tool is integrated on the STM32G081B­EVAL Evaluation board. Compared to ST-LINK/V2 the changes are listed below.

The new features supported on ST-LINK/V2-1 are:

• USB software enumeration

• Virtual COM port interface on USB

• Mass storage interface on USB

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

This feature is no longer supported on ST-LINK/V2-1:

• SWIM interface

For all general information concerning debugging and programming features common
between V2 and V2-1 refer to ST-LINK/V2 in-circuit debugger/programmer for STM8 and

STM32 User manual (UM1075) in the www.st.com website.

Note: It is possible to power the board via CN6 (Embedded ST-LINK/V2-1 USB connector) even if

an external tools is connected to CN12 or CN13 (External SWD connector).

8.1.1 Drivers

The ST-LINK/V2-1 requires a dedicated USB driver, which can be found on www.st.com for
Windows PC (7, 8 or 10).

In case the STM32G081B-EVAL Evaluation board is connected to the PC before the driver
is installed, some STM32G081B-EVAL interfaces may be declared as “Unknown” in the PC
device manager. In this case, the user must install the driver files, and update the driver of
the connected device from the device manager.

Note: Prefer using the “USB Composite Device” handle for a full recovery.

Figure 7. USB Composite Device

8.1.2 ST-LINK/V2-1 firmware upgrade

The ST-LINK/V2-1 embeds a firmware upgrade mechanism for in-situ upgrade through the
USB port. As the firmware may evolve during the lifetime of the ST-LINK/V2-1 product (for
example new functionality, bug fixes, support for new microcontroller families), it is
recommended to visit the www.st.com website before starting to use the STM32G081B-
EVAL board and periodically, to stay up-to-date with the latest firmware version.

UM2403 Rev 1 15/78

77

Hardware layout and configuration UM2403

8.2 Power supply

The STM32G081B-EVAL Evaluation mother board is designed to be powered by 5 V DC
power supply and is protected by PolyZen from wrong power plug-in event. It is possible to
configure the mother board to use any of the following four sources for the power supply:

• 5 V DC power adapter connected to CN16, the power Jack on the board (Power
Supply Unit on silk screen of JP17 (PSU)). The external power supply is not provided
with the board.

• 5 V DC power with 500 mA limitation from CN6, the USB Micro-B connector of
STLINK/V2-1 (USB 5 V power source on silkscreen of JP17 (STlk)). If the USB
enumeration succeeds, the ST-LINK U5V power is enabled, by asserting the PWR_EN
pin. This pin is connected to a power switch, which powers the board. This power
switch features also a current limitation to protect the PC in case of short-circuit on the
board. If overcurrent (more than 500 mA) happens on the board, the LED LD5 lights
up.

• 5 V DC power from CN6 directly, the USB Micro-B connector of STLINK/V2-1 (USB 5 V
power source on silkscreen of JP17 (U5V)).

• 5 V DC power from CN5 or CN9, the extension connector for daughterboard power
source (D5V) on silkscreen of JP19).

The UCPD daughterboard uses its own 19V power adapter to support USB PD, in this case
the mother board uses D5V from the UCPD daughterboard to supply all circuits on
STM32G081B-EVAL Evaluation board. D5V of the UCPD daughterboard has three sources
as below:

• 19 V DC power adapter connected to CN3 on the UCPD daughterboard

• Power from Type-C Port1 CN7 on the UCPD daughterboard

• Power from Type-C port2 CN5 on the UCPD daughterboard

19 V DC power adapter and Type-C Port1 sources are automatically selected by circuit (D8
and T10 on the UCPD daughterboard). Refer to Table15 for detail.

16/78 UM2403 Rev 1

UM2403 Hardware layout and configuration

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The STM32G081B-EVAL Evaluation board can be powered from the ST-LINK/V2-1 USB
connector CN6 with a PC, but only the ST-LINK/V2-1 circuit has the power before USB
enumeration, because the host PC only provides 100
the USB enumeration, the STM32G081B-EVAL board requires 300
PC. If the host is able to provide the required power, the enumeration succeeds, the power
transistor U5 is switched ON, the red LED LD7 is turned ON, and thus the STM32G081B­EVAL board is powered and can consume maximum 300 mA current. If the host PC is not
able to provide the requested current, the enumeration fails. Therefore the STM32 part
including the extension board is not powered. As a consequence the red LED LD7 remains
turned OFF. In this case it is mandatory to use an external power supply to supply extra
power.

E5V (from PSU) or D5V can be used as external power supply in case current consumption
of the STM32G081B-EVAL board exceeds the allowed current on USB. In this condition it is
still possible to use USB for communication, for programming or debugging only, but it is
mandatory to power the board first using E5V or D5V, and then connecting the USB cable to
the PC. Proceeding this way ensures that the enumeration succeeds thanks to the external
power source.

The following power sequence procedure must be respected:

mA to the boards at that time. During

mA power from the host

UM2403 Rev 1 17/78

77

Hardware layout and configuration UM2403

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1. Connect jumper JP17 for PSU or D5V side

2. Check that JP5 is removed

3. Connect the external power source to PSU or D5V (daughterboard mounted)

4. Check red LED LD7 is turned ON

5. Connect the PC to USB connector CN6

If this order is not respected, the board may be powered by VBUS first then E5V or D5V,
and the following risks may be encountered:

1. If more than 300 mA current is needed by the board, the PC may be damaged or
current can be limited by PC. As a consequence the board is not powered correctly.

2. 300 mA is requested at enumeration (since JP5 must be OFF), so there is risk that
request is rejected and enumeration does not succeed if PC can't provide such current.
Consequently the board is not powered (LED LD7 remains OFF).

In case the STM32G081B-EVAL board is powered by an USB charger through CN6, there is
no USB enumeration needed. User can set JP17 to U5V to allow the board to be powered
anyway from CN6.

The power source is selected by setting the related jumpers JP17, JP15 and JP16 as
described in table 2.

Table 2. Power source related Jumpers

Jumper Description

JP17 is used to select one of the four possible power supply resources.

Only for power supply from USB (CN6) of ST-LINK/V2-1 to STM32G081B-EVAL, JP17 is set as
shown on the right:

Only for power supply from the daughterboard connectors(CN5 or CN9) to STM32G081B­EVAL, JP17 is set as shown on the right: (default Setting)

JP17

Only for power supply jack(CN16) to the STM32G081B-EVAL, JP17 is set as shown on the
right:

Only for power supply from USB (CN6) to STM32G081B-EVAL without current limited, JP17 is
set as shown on the right:

18/78 UM2403 Rev 1

UM2403 Hardware layout and configuration

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Table 2. Power source related Jumpers (continued)

Jumper Description

The Vbat pin of STM32G081RBT6 is connected to VDD when JP15 is set as shown on the right
(default setting):

JP15

The Vbat pin of STM32G081RBT6 is connected to 3V battery when JP15 is set as shown on the
right:

The VDD pin of STM32G081RBT6 is connected to 3.3V when JP16 is set as shown on the right
(default setting), when the UCPD daughterboard is used, this setting is mandatory:

JP16

The VDD pin of STM32G081RBT6 is connected to VDD_ADJ when JP16 is set as shown on the
right:

Note: The VDD_MCU Idd measurement can be done by current meter which mounted on JP11

when it is open. But JP11 is not allowed to be opened without current meter; otherwise
STM32G081RBT6 would be damaged due to lacking of power supply on its power pins.

Note: LD8 is lit when VDD < 2.7 V and in this case IOs and some Analog IPs of STM32G081RBT6

work with degraded performances.

Note: The UCPD daughterboard works with VDD=3.3V, so it is mandatory to close JP16 pin1 and

pin2.

The LED LD7 is lit when the STM32G081B-EVAL Evaluation board is powered by the 5V
correctly.

Tab le 3 shows the low voltage limitations that might apply depending on the characteristics

of some peripheral components. Components might work incorrectly when the power level
is lower than the limitation.

Board peripheral component IO name

Mother board Audio amplifier U17 Audio input 2.2V

Mother board Microphone amplifier U12 Audio output 2.7V

Legacy daughterboard Smartcard CN2 USART1 2.7V

Table 3. Low voltage limitation

UM2403 Rev 1 19/78

Low voltage

limitation

77

Hardware layout and configuration UM2403

8.3 Clock references

Two clock sources are available on STM32G081B-EVAL Evaluation board for
STM32G081RBT6 and RTC embedded.

• X2, 32KHz Crystal for embedded RTC

• X3, 8MHz Crystal for the STM32G081RBT6 microcontroller, it can be disconnected by

removing R45 and R46 when internal RC clock is used

Jumper Description

PC14 is connected to 32KHz crystal when SB18 is open (default setting).

SB18

SB19

PC14 is connected to extension connector CN9 when SB18 is closed. In such case R43 must be
removed to avoid disturbance due to the 32Khz quartz.

PC15 is connected to 32KHz crystal when SB19 is open (default setting).

PC15 is connected to extension connector CN9 when SB19 is closed. In such case R44 must be
removed to avoid disturbance due to the 32Khz quartz.

Table 4. 32 KHz crystal X2 related solder bridges

Jumper Description

PF0 is connected to 8MHz crystal when SB20 is open (default setting).

SB20

SB21

PF0 is connected to extension connector CN10 when SB20 is closed. In such case R45 must be
removed to avoid disturbance due to the 8Mhz quartz.

PF1 is connected to 8MHz crystal when SB21 is open (default setting).

PF1 is connected to extension connector CN10 when SB21 is closed. In such case R46 must be
removed to avoid disturbance due to the 8Mhz quartz.

Table 5. 8 MHz crystal X3 related solder bridges

8.4 Reset source

The general reset of the STM32G081B-EVAL Evaluation board is active low and the reset
sources include:

• Reset button B1

• Debugging Tools from SWD connector CN12 and CN13

• Daughterboard from CN4

• Embedded ST-LINK/V2-1

• RS232 connector CN11 for ISP.

Note: The jumper JP12 to be closed for RESET handled by pin8 of RS232 connector CN11 (CTS

signal), please refer to

Section 8.6.2 for detail.

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8.5 Boot Option

The STM32G081B-EVAL Evaluation board is able to boot from:

• Embedded User Flash

• System memory with boot loader for ISP

• Embedded SRAM for debugging

The boot option is configured by closing JP9 pin2-3 and setting one jumper cap on CN10
among pin 17, pin 19 and pin 21 and one option bit (see

Table 6. Boot related jumper

Table 6 and Tab le 7).

Jumper

configuration

Bit25 in USER

OPTION BYTES

CN10 pin 19 and
pin 17 closed by

X STM32G081B-EVAL boot from User Flash (default setting)

jumper

CN10 pin 19 and
pin 21 closed by

0 STM32G081B-EVAL boot from Embedded SRAM

jumper

CN10 pin 19 and
pin 21 closed by

1 STM32G081B-EVAL boot from System Memory

jumper

Table 7. Boot0 related jumpers

Jumper Description

PA14-BOOT0 is used as SWCLK when JP9 is set as shown on the right (default setting).

JP9

The Bootloader_BOOT0 is managed by pin 6 of connector CN11 (RS232 DSR signal) and it is
connected to PA14-BOOT0 when JP9 is set as shown on the right. This configuration is used for
boot loader application only.

Boot from

8.6 Peripherals on mother board

8.6.1 Audio

The STM32G081B-EVAL Evaluation board supports stereo audio playback and microphone
recording by an external headset connected on audio jack CN15. Audio play is connected to
DAC output of STM32G081RBT6 through an audio amplifier and microphone on headset is
connected to ADC input of STM32G081RBT6 through a microphone amplifier. Audio
amplifier can be enabled or disabled by setting of JP18 and mono/stereo playback can be
chosen by setting of JP6, refer to

Tabl e 8 for detail.

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Table 8. Audio related jumpers

Jumper Description

Speaker amplifier U17 is enabled when JP18 is closed (default setting)

JP18

Speaker amplifier U17 is disabled when JP18 is open

PA4 is connected to VIN1 of Audio amplifier when JP19 is closed (default setting)

JP19

PA4 is disconnected to VIN1 of Audio amplifier when JP19 is open

Mono playback is enabled when JP6 is set as shown on the right (default setting):

JP6

Stereo playback is enabled when JP6 is set as shown on the right:

Audio amplifier operates correctly when VDD > 2.2 V and microphone amplifier operates
correctly when VDD > 2.7

V.

8.6.2 RS232 and RS485

Communication through RS232 (with Hardware flow control CTS and RTS) and RS485 is
supported by D-type 9-pins RS232/RS485 connector CN11, which is connected to USART1
of STM32G081RBT6 on STM32G081B-EVAL Evaluation board. The signal
Bootloader_RESET (shared with CTS signal) and Bootloader_BOOT0 (shared with DSR
signal) are added on RS232 connector CN11 for ISP support.

By default, PC4 and PC5 are connected as TX and RX signals. PA9 and PA10 are also can
be connected as these two signals for bootloader which is NOT supported on PC4 and PC5
by setting of jumpers in

Jumper Description

RS232_RX is connected to RS232 transceiver and RS232 communication is enabled when
JP14 is set as shown on the right (default setting):

JP14

RS485_RX is connected to RS485 transceiver and RS485 communication is enabled when
JP14 is set as shown on the right:

PC4 is connected as TX signal without bootloader being supported when JP10 is set as shown
on the right (Default setting):

JP10

PA9 is connected as TX signal with bootloader being supported when JP10 is set as shown on
the right (CN1 motor control connector is needed to be open in this case):

Table 9.

Table 9. RS232 and RS485 related jumpers

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Table 9. RS232 and RS485 related jumpers (continued)

PC5 is connected as RX signal without bootloader being supported when JP8 is set as shown
on the right (default setting):

JP8

PA10 is connected as RX signal with bootloader being supported when JP8 is set as shown on
the right (in this case, CN1 motor control connector must be open):

The RS485 communication is supported by RS485 transceiver ST3485EBDR which
connected to pin4 and pin9 of D-type 9-pins connector CN11 (share same connector with
USART1).

Jumper Description

The external failsafe biasing are enabled when solder bridges SB29 and SB31 was closed

SB29,SB31

Default Setting: Not fitted

The bus termination is enabled when solder bridge SB32 is closed.

SB32

Default Setting: Not fitted

The AC termination is disabled when solder bridge SB30 is closed for high baud rate

SB30

communication.

Default Setting: Not fitted

Table 10. RS485 related solder bridges

8.6.3 microSD card

The 8-GB (or more) microSD card connected to SPI1 port (shared with color LCD) of
STM32G081RBT6 is available on the board. microSD card detection is managed by
standard IO port PC9 and it must be set with internal pull-up.

8.6.4 Analog Input

The two-pin header CN17 and 10K ohm potentiometer RV3 was connected to PB2 of
STM32G081RBT6 as analog input. A low pass filter can be implemented by replacing of
R111 and C90 with right value of resistor and capacitor as requested by end user's
application.

8.6.5 External I2C Connector

The I2C1 bus of the STM32G081RBT6 is connected to CN2 on the STM32G081B-EVAL.
The I2C functional daughterboard can be mounted on the CN2 connector and accessed by
the microcontroller through the I2C1 bus, it shares same I2C1 bus with Temperature sensor
U3 and DDC on HDMI_Source connector CN3 on legacy peripheral daughterboard.

The pull up voltage level of I2C1 bus is automatically decided by the daughterboard (the
legacy peripheral daughterboard or the UCPD daughterboard) on CN4 and CN5. If there is

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no daughterboard on these connector, pin17 must be closed to pin18 on both CN4 and CN5
by jumpers. Thus I2C pull up voltage and reset pull up voltage on CN2 would be the voltage
of VDD.

8.6.6 Motor Control

The STM32G081B-EVAL Evaluation board supports both asynchronous and synchronous
three-phase brushless motor control via a 34-pins connector CN1, which provides all
required control and feedback signals to and from motor power-driving board.

Available signals on this connector includes emergency stop, motor speed, 3 phase motor
current, bus voltage, power heatsink coming from the motor driving board and 6 channels of
PWM control signal going to the motor driving circuit.

Daughterboard on CN4 and CN5 must be removed and some jumpers set for motor control
application:

• Close JP1, JP2 and JP3.

• Open JP4 and JP6.

• Open pin2-3 of JP8 and JP10.

8.6.7 Display and Input devices

The 2.4" color TFT LCD connected to SPI1 port of STM32G081RBT6 and 4 general
purpose color LED's (LD 1,2,3,4) are available as display device. The 4-direction joystick
(B3) with selection key which connected to PA0 and supports wakeup feature. Tamper
button (B2) are also available as input devices.

Pin Description Pin connection Pin Description Pin connection

1 CS PB8 9 VDD 3.3V

2 SCL PB3 10 VCI 3.3V

3SDI PA7 11GND GND

4RS - 12GND GND

5 WR - 13 BL_VDD 5V

6 RD - 14 BL_Control 5V

7 SDO PB4 15 BL_GND GND

8 RESET RESET# 16 BL_GND GND

Table 11. LCD modules

2.4” TFT LCD connector CN14

Note: The bi-directional voltage translator is implemented on SPI MOSI signal between

STM32G081RBT6 and LCD to support 3-wires serial interface of LCD panel only supports
3-wire SPI port. The direction of this voltage translator is controlled by IO PC12 (the IO PA7
is working as MOSI when PC12 is high or as MISO when PC12 is LOW).

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8.7 Peripherals on legacy peripheral daughterboard

8.7.1 LDR (Light dependent resistor)

The VDD is divided by resistor bridge of LDR VT9ON1 and 8.2 K resistor and connected to
PA1 (COM1_IN+/ADC IN1) as shown

Figure 9 on STM32G081B-EVAL Evaluation board.

Figure 9. GP comparator 1

It's possible to compare LDR output with ¼ band gap, 1/2 band gap, 3/4 band gap, band
gap and DAC1 OUT and to connect LDR output to ADC IN1 for AD conversion.

8.7.2 Temperature sensor

A temperature sensor STLM75M2F is connected to the I2C1 bus of the STM32G081RBT6,
and shares same I2C1 bus with EXT I2C connector (on mother board) and DDC on
HDMI_Source connector CN3 (on legacy board).

I2C address of temperature sensor is 0b100100(A0), A0 can be 0 or 1 depends on the
setting of SB7.

Solder Bridge Description

SB7

Note: The temperature result measured from STLM75M2F would be a little higher than the

ambient temperature due to the power dissipation of components on the board.

Table 12. Temperature sensor related solder bridge

I2C address A0 is 0 when SB7 is open.

(Default setting)

I2C address A0 is 1 when SB7 is closed.

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8.7.3 Smartcard

STMicroelectronics smartcard interface chip ST8024L is used on STM32G081B-EVAL
Evaluation board for asynchronous 1.8V, 3V and 5V smartcards. It performs all supply
protection and control functions based on the connections with STM32G081RBT6 listed in

Tab le 13.

Table 13. Connection between ST8024L and STM32G081RBT6

Signals of

ST8024L

5V/3V Smartcard power supply selection pin PB15

I/OUC MCU data I/O line PA2

XTAL1 Crystal or external clock input PD4
OFF Detect card presence, Interrupt to MCU PB12

RSTIN Card reset input from MCU PA15

CMDVCC Start activation sequence input (Active Low) PB0

1.8V

Smartcard operates correctly when VDD > 2.7 V.

8.7.4 HDMI CEC

Two HDMI connectors CN1 and CN3 are available on STM32G081B-EVAL legacy
peripheral daughterboard.

• The connector CN1 is HDMI sink connector with
– DDC connected to I2C2 of STM32G081RBT6
– HPD controlled by IO PD2 through transistor T1
– CEC connected to PB10 through transistor T4

• The connector CN3 is HDMI source connector with
– DDC connected to I2C1 of STM32G081RBT6 and shared with Temperature

sensor and EXT I2C connector
– HPD controlled by IO PD3
– CEC connected to PB10 through transistor T4
– HDMI 5V powered by power switch U1

Description

CC operation selection. Logic high selects 1.8 V

1.8 V V
operation and overrides any setting on the 5V/3V pin.

Connect to

STM32G081RBT6

PA3

The signals TDMS D+[0..2], TDMS_CLK+, TDMS D-[0..2], TDMS_CLK- on these two HDMI
connectors are connected together.

The CEC injector mode can be enabled by some PCB reworks for debugging purpose only:

• Remove resistors R3, R4, R7, R9, R10, R15 and R22.

• Close solder bridges SB3, SB4, SB5 and SB6.

Note: The I/O PD2 must be set in open-drain output mode by firmware when working as an HPD

signal control on the HDMI sink connector CN1.

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8.7.5 IR LED and IR receiver

The IR receiver TSOP34836 is connected to PC6 of STM32G081RBT6 and a current
around 100mA on IR LED is driven by PB9 through transistors T2 and T3 on the board.

Note: IR LED may be driven by PB9 directly with 20mA current when SB1 is closed and SB2 is

open.

8.8 USB Type-C and Power Delivery daughterboard

The UCPD daughterboard is a development platform composed of STM32G081B-EVAL
Evaluation board. This daughterboard is used for demonstrating the functionalities of the
USB Type-C and USB Power Delivery (USB PD) technologies, facilitating the users to
develop their solutions. Refer to

Note: The USB PD reference design on the UCPD daughterboard is used to demonstrate the

capability of STM32G081RBT6. This USB PD circuit may not pass all USB PD certifications.

Note: The UCPD daughterboard works with VDD=3.3V. So JP16 pin1-2 must be closed on mother

board.

Note: The UCPD daughterboard conflicts with legacy peripheral daughterboard and Motor control

on STM32G081B-EVAL Evaluation board.

Figure 3 for daughterboard structure.

8.8.1 USB Type-C receptacles

Two USB Type-C certified receptacles CN7 and CN5 are present on the UCPD
daughterboard, representing respectively the PORT 1 and PORT 2. PORT 1 can be used as
DRP (Dual-Role Port), which is eligible to supply another platform plugged by a USB
Type-C cable when they are configured as Provider or, otherwise, to be supplied in case of
Consumer configuration. PORT 2 can only be used as SINK.

Video signals on display port input connector (CN6) and data signals on USB3.1 Gen1
Type-B connector (CN4) are multiplexed on Type-C PORT 1 thanks to a crosspoint switch
IC TUSB546-DCI. These signals on CN6 or on CN4 have to be generated by an external
computer or notebook to evaluate the alternate mode (AM) capability of the USB PD
technology. The crosspoint switch can be configured through I2C bus, and its I2C address is
0b1000100. The cable which is plugged into CN4 can be detected by PA15.

Same as Type-C PORT1, video signals on display port output connector (CN2) are
connected to Type-C PORT 2 through another crosspoint switch IC CBTL08GP053 and
DisplayPort Linear Redriver IC SN65DP141. I2C address of CBTL08GP053 is 0b0110000
and SN65DP141's default I2C address is 0b0000000. A Type-A receptacle's (CN1) D+ and
D- signals are also connected to Type-C PORT 2 directly. Its VBUS can be set by JP3 in

Tab le 14.

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Table 14. VBUS related jumpers

Jumper Description

VBUS is connected to VCONN when JP3 is set as shown on the right (default setting).

JP3

VBUS is connected to D5V through mother board when JP3 is set as shown on the right.

Note: Some week USB charger can not provide power to board immediately from port1 Type-C

receptacle when external 19V power adapter is plugged off. If board lose power and reset
during such use case, close JP6 may help to solve this problem. JP6 is open by default.

8.8.2 Power Delivery and local power management

The UCPD daughterboard has its own external power jack (CN3, 19V/4A input) to support
power delivery function and to provide up to 15V/3A on Type-C port1 (CN7).

The STM32G081B-EVAL Evaluation board can be powered by D5V from the UCPD
daughterboard as shown in
by three resources, 19V from external power jack, VBUS on Port 1 and VBUS on Port 2. A
circuit is implemented on the UCPD daughterboard to automatically select external 19V
power supply or VBUS on Port1, because external 19V and VBUS on Port1 are the two
power sources for Port1 to D5V. A jumper JP5 is used to select D5V resources in

Table 15. Local power related jumpers

Figure 5. D5V on the UCPD daughterboard can be generated

Tab le 15.

Jumper Description

D5V from the UCPD daughterboard is generated from external 19V or VBUS on Port1 when JP5
is set as shown on the right (default setting).

JP5

D5V from the UCPD daughterboard is generated from VBUS on Port2 when JP5 is set as shown
on the right.

8.8.3 VBUS management and discharge mechanism

Type-C port1 (CN7) can be used as DRP (Dual-Role Port), its VBUS can be managed for
supplying other platforms as Provider, or to be supplied as Consumer. Two MOSFETs T6
and T7 are set in back-to-back configuration to protect and isolate the VBUS supplying path
on both directions.

If the CN7 acts as Provider, the VBUS is on the supply path by mean of the discrete load
switch (T6 and T7) driven by the STM32G081RBT6 (GPIO, PD3). For the Consumer case,
the same VBUS path is managed by PD3 of STM32G081RBT6 enabling the discrete load
switch.

All power profiles are listed in Tab le 16.

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CN7 role

Provider

Consumer -

Table 16. VBUS Power Delivery profiles

Solder bridges

setting

SB2, SB3, SB23,
SB26 ON

SB13, SB14, SB15
OFF

SB13, SB14, SB15
ON

SB2, SB3, SB23,
SB26 OFF

Power level

PWM Mode:
PWM voltage-3A

GPIO Mode:
5V / 9V / 15V- 3A

Decided by Provider
which is connected
through Type-C cable

Source
control

signal

PD3 High PC1-PWM signal

PD3 High

PD3 low -

Voltage control signal

5V: PC1(VSOURCE­9V) and
PA1(VSOURCE-15V)
tristate

9V: PC1(VSOURCE­9V) low

15V: PA1 (VSOURCE­15V) low

Moreover, the VBUS path on PORT1 presents a discharge mechanism implemented by the
MOSFET T8 and an RC filter and controlled by PB13, and the VBUS path on PORT2
presents a discharge mechanism implemented by the MOSFET T9 and an RC filter and
controlled by PB14.

8.8.4 VBUS voltage-sensing and current-sense stage

Each Type-C port is equipped by a voltage-sensing and a current-sensing stage which are
matched with the voltage sensing carried by the STM32G081RBT6 ADC peripherals. Refer
to

Table 17 for detail. They are able to monitor the right power level applied on the port

VBUS.

PORT VSENSE ADC ISENSE ADC

PORT 1 PB1 ADC_IN9 PB10 ADC_IN11

PORT 2 PA3 ADC_IN3 PB12 ADC_IN16

Table 17. Voltage-sensing and current-sensing ADC

8.8.5 CC management

Dead battery, VCONN output and fast role swap functions are supported on CC signal of
Type-C PORT 1.

1. Dead battery enable
Dead battery function is supported by OVP chip U17 and U16. And this function also

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embedded in STM32G081RBT6. When OVP part U17 is bypassed, dead battery
function in STM32G081RBT6 can be enable or disable through enable signals by set
JP2 (CC1) or JP1 (CC2). Refer to

Jumper Description

Embed dead battery function is enable when JP1 is set as shown on the right (default setting).

Table 18. Dead battery related jumpers

Tabl e 18 for detail.

JP1

JP2

Embed dead battery function is disable when JP1 is set as shown on the right.

Embed dead battery function is enable when JP2 is set as shown on the right (default setting).

Embed dead battery function is disable when JP2 is set as shown on the right.

2. VCONN output control

When the full-featured cable is connected to PORT 1, the VCONN is directly managed by
the STM32G081RBT6 by mean of the PD4 or PB9 and the load switches STMPS2161 U10
and U14.

3. Fast role swap

Type-C PORT 1 can be configure to action fast role swap managed by STM32G081RBT6
through PA2 (CC1) and PB0 (CC2).

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9 Connectors

9.1 Connectors on mother board

9.1.1 Motor control connector CN1

Figure 10. Motor Control connector CN1 (top view)

Description

Emergency STOP PB12 1 2 - GND

PWM-UH PA8 3 4 - GND

PWM-UL PD2 5 6 - GND

PWM-VH PA9 7 8 - GND

PWM-VL PD3 9 10 - GND

PWM-WH PA10 11 12 - GND

PWM-WL PD4 13 14 PA1 BUS VOLTAGE

PHASE A
CURRENT

PHASE B
CURRENT

PHASE C
CURRENT

NTC BYPASS
RELAY

DISSIPATIVE
BRAKE PWM

STM32G081RBT6

PA2 15 16 GN D

PA6 17 18 GN D

PB10 19 20 - GND

PB9 21 22 - GND

PB15 23 24 - GND

Table 19. Motor control connector CN1

Pin of

Pin

number of

CN1

Pin

number of

CN1

Pin of

STM32G081RBT6

Description

+5V power - 25 26 PA3

PFC SYNC2 PD0

PFC SYNC1 PC1

PFC PWM PB1 29 30 - GND

27 28 3.3V power

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Table 19. Motor control connector CN1 (continued)

Description

Encoder A PC6 31 32 - GND

Encoder B PB5 33 34 PB0 Encoder Index

Pin of

STM32G081RBT6

Pin

number of

CN1

Pin

number of

CN1

Pin of

STM32G081RBT6

Description

9.1.2 External I2C connector CN2

Figure 11. I2C EXT connector CN2 (front view)

Table 20. RF E2PROM connector CN2

Pin number Description Pin number Description

1 I2C1_SDA (PB7) 5

2NC 6NC

3 I2C1_SCL (PB6) 7 GND

4 EX_RESET(PC0) 8 NC

9.1.3 Daughterboard connector CN4 and CN5

Two 18-pins male headers CN4 and CN5 are designed to connect with the legacy peripheral
daughterboard or the UCPD daughterboard to STM32G081B-EVAL Evaluation mother
board. All GPI/Os are available on CN4, CN5 and extension connector CN9, CN10.

Each pin on CN4 and CN5 can be used by a daughterboard after disconnecting it from the
corresponding function block on STM32G081B-EVAL Evaluation board. Please refer to

Tab le 21 and Tab l e 22 for detail.

PWR (Define by daughterboard
on CN5, or VDD when short CN5
pin17 and pin18)

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Pin Signal

Mother board

Table 21. Daughterboard connector CN4

Legacy

Function

daughterboard

Function (CN5)

daughterboard
Function (CN9)

UCPD

How to disconnect with

function block on mother

board

1 PA1 MC_BusVoltage LDR_OUT V_CTL2 Keep JP1 open

2 PA15 - Smartcard RST USB3_DET -

3 PB6 I2C1_SCL I2C1_SCL I2C1_SCL -

4 PB7 I2C1_SDA I2C1_SDA I2C1_SDA -

5GND----

6 RESET# - - - -

7 PC6 MC_ENA IR_IN

Display port
HPD_SOURCE

-

8 PB13 - I2C2_SCL DISCHARGE 1 -

9 PB14 - I2C2_SDA DISCHARGE 2 -

10 PB1 MC_PFCpwm - VSENSE 1 -

11 PB10 MC_CurrentC HDMI_CEC ISENSE 1 -

12 PA3 MC_heatsinkTemp Smartcard 1V8 VSENSE 2 Keep JP2 open

13 PB12

MC_EmergencyST
OP

Smartcard OFF ISENSE 2 Keep JP3 open

14+3V3----

Daughterboard
detection & USB
PD output VSENSE

-

15 PB11

Daughterboard
detection

Daughterboard
detection

16 VDD_ANA - - - -

17 I2C_PU

I2C pull up power
of CN2

---

18 VDD - - - -

Pin Signal

Mother board

Table 22. Daughterboard connector CN5

Legacy

Function

daughterboard

Function (CN4)

daughterboard
Function (CN8)

UCPD

How to disconnect with

function block on mother

board

1 PA8 MC_UH - PORT1_CC1 -

2 PB15

3PA9

4PA10

MC_Dissipative
brake

MC_VH/USART1_
TX_BOOT

MC_WH/USART1_
RX_BOOT

Smartcard 3/5 V PORT1_CC2 -

- PORT1_DB1 Keep JP10 pin2-3 open

- PORT1_DB2 Keep JP8 pin2-3 open

5GND----

6 PD4 MC_WL Smartcard CK VCONN_EN1 -

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Table 22. Daughterboard connector CN5 (continued)

Pin Signal

7 PB9 MC_NTC IR_OUT VCONN_EN2 -

8 PA2 MC_Current A Smartcard TX FRS_TX1 -

9 PB0 MC_ENINDEX

10 +5V - - - -

11 PB5 MC_ENB Temp Sensor INT

12 PC1 MC_PFCsync1 - V_CTL1 -

13 PD0 MC_PFCsync2 - PORT2_CC1 -

14 PD2 MC_UL HDMI_ HPD_SINK PORT2_CC2 -

15 PD3 MC_VL

16 D5V - - - -

EXT I2C

17

PWR

18 VDD - - - -

Mother board

Function

Power of CN2 5V VDD -

Legacy

daughterboard

Function (CN4)

Smartcard
CMDVCC

HDMI_
HPD_SOURCE

UCPD
daughterboard
Function (CN8)

FRS_TX2 -

Display port
HPD_IN

SOURCE_EN -

How to disconnect with

function block on mother

board

-

9.1.4 ST-LINK/V2-1 USB Micro-B connector CN6

The USB Micro-B connector CN6 is used to connect embedded ST-LINK/V2-1 to PC for
debugging of board.

Figure 12. USB Micro-B connector CN6 (front view)

Pin number Description Pin number Description

1 VBUS (power) 4 ID

2DM 5GND

3DP --

Table 23. USB Micro-B connector CN6

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9.1.5 ST-LINK/V2-1 programming connector CN7

The connector CN7 is used only for embedded ST-LINK/V2-1 programming during board
manufacturing. It is not populated by default and not for end user.

9.1.6 microSD connector CN8

Figure 13. microSD connector CN8 (front view)

Pin number Description

1 NC 5 MicroSDcard_CLK (PB3)

2 MicroSDcard_CS (PD1) 6 Vss/GND

3 MicroSDcard_DIN(PA7) 7 MicroSDcard_DOUT(PB4)

4+3V3 8NC

- - 10 MicroSDcard_detect (PC9)

Table 24. microSD connector CN9

9.1.7 Extension connector CN9 and CN10

Two 22-pin male headers CN9 and CN10 can be used to connect with daughterboard or
standard wrapping board to STM32G081B-EVAL Evaluation board. The standard width
between CN9 pin1 and CN10 pin1 is 2700mils (68.58mm). The standard was implemented
on the majority of Evaluation boards.

Each pin on CN9 and CN10 can be used by a daughterboard after disconnecting it from the
corresponding function block on STM32G081B-EVAL Evaluation board. Please refer to

Tab le 25 and Tab l e 26 for detail.

Pin

number

Description

UM2403 Rev 1 35/78

77

Connectors UM2403

Pin Description Alternative Function

Table 25. Extension connector CN9

How to disconnect with function block on

STM32G081B-EVAL board

1 PD8 LED3 Close SB11, Open SB14, SB34

3 PC7 GPIO_JOY_RIGHT Open SB40

5 PA12 USART_1_RTS Open SB16

7 PC9 GPIO_SD_DETECT Open SB8

9 PD5 LED1 Open SB36

11 PD6 LED2 Open SB35

13 PC4 USART_1_TX Open JP10 pin1-2

15 PC10 VCP_USART_3_TX Open SB5

17 GND - -

19 PC14 OSC32_IN Remove R43, Close SB18

21 PC13 Button (Tamp, Wakeup2) Open SB42

2 PD9 LED4 Close SB10, Open SB13, SB33

4 PA11 USART_1_CTS Open SB28

6 PC8 GPIO_JOY_LEFT Open SB39

8 PD1 GPIO_SD_CS Open SB9

10 GND - -

12 PC5 USART_1_RX Open JP8 pin1-2

14 PB4 LCD/SD1_MISO Open SB12

16 PC11 VCP_USART_3_RX Open JP7

18 PC15 OSC32_OUT Remove R44, Close SB19

20 D5V - -

22 +3V3 - -

Pin Description Alternative Function

Table 26. Extension connector CN10

How to disconnect with function block on

STM32G081B-EVAL board

1 PA7 LCD/SD1_MOSI Open SB24

3 PA5 AUDIO_OUT_DAC1_OUT2 Open JP6 pin2-3

5 PA13 SWDIO Open SB4, Remove R48

7 PB8 GPIO_LCD_CS Open SB27

9 PA0 JOY_SEL_TAMP_WKUP1 Open SB38

11 PC2 GPIO_JOY_UP Open SB41

13 PF1 OSC_OUT Remove R46, Close SB21

15 PF0 OSC_IN Remove R45, Close SB20

36/78 UM2403 Rev 1

UM2403 Connectors

-36

Table 26. Extension connector CN10 (continued)

Pin Description Alternative Function

How to disconnect with function block on

STM32G081B-EVAL board

17 GND - -

19 PA14-BOOT SWCLK || BOOT0 Open JP9 pin1-2

21 VDD - -

2 PB2 POTENTIOMETER_ADC_IN10 Open SB43

4PA6

AUDIO_IN_ADC_IN6/
MC_CurrentB

Open JP4, Keep CN1 disconnected

6 PA4 AUDIO_OUT_DAC1_OUT1 Open JP6 pin1-2, JP19

8 PB3 LCD/SD1_SCK Open SB25

10 GND - -

12 PC0 GPIO_EXT_RST Remove R12, Keep CN2 disconnected

14 PC3 GPIO_JOY_DOWN Open SB37

16 PC12 GPIO_LCD/SD_MOSI_DIR Open SB26

18 PF2-NRST RESET Open SB23

20 PF3-VBAT VBAT Open JP15

22 PF4-VREF+ VREF+ Open SB17, SB22

9.1.8 RS232 and RS485 connector CN11

Figure 14. RS232 and RS485 connector CN11 (front view)

Pin number Description

1 NC 6 Bootloader_BOOT0

2

3

RS232_RX
(PC5 or PA10)

RS232_TX
(PC4 or PA9)

Table 27. RS232 & RS485 connector CN11

7 RS232_RTS(PA12)

8 RS232_CTS(PA11) / Bootloader_RESET

Pin

number

Description

UM2403 Rev 1 37/78

77

Connectors UM2403

D^ϯϬϳϮϮsϮ

   

 



  

 

Table 27. RS232 & RS485 connector CN11 (continued)

Pin number Description

4 RS485_A 9 RS485_B

5GND --

9.1.9 Standard SWD connector CN12

Figure 15. Standard SWD debugging connector CN12 (top view)

Table 28. Standard SWD debugging connector CN12

Pin

number

Description

Pin number Description

Pin

number

Description

1 VDD 2 VDD

3NC 4GND

5NC 6GND

7SWDAT(PA13) 8GND

9 SWCLK(PA14) 10 GND

11 10K pull-down 12 GND

13 NC 14 GND

15 RESET# 16 GND

17 10K pull-down 18 GND

19 10K pull-down 20 GND

38/78 UM2403 Rev 1

UM2403 Connectors

06Y9

    

    

-36

'&9

*1'



9.1.10 High density SWD connector CN13

Figure 16. High density SWD debugging connector CN13 (top view)

Pin number Description

1 VDD 2 SWDAT(PA13)

3 GND 4 SWCLK(PA14)

5GND 6NC

7 KEY 8 NC

9 GND 10 RESET#

Table 29. High density SWD debugging connector CN13

9.1.11 TFT LCD connector CN14

A TFT color LCD board is mounted on CN14. Please refer to Section 1.6.7 for detail.

9.1.12 Audio jack CN15

A 3.5mm Stereo audio jack CN15 connected to audio DAC and ADC is available on
STM32G081B-EVAL board.

9.1.13 5 V Power connector CN16

STM32G081B-EVAL Evaluation mother board can be powered from a DC 5V power supply
via the external power supply jack (CN16) shown in
be positive.

Pin

number

Description

Figure 17. The central pin of CN16 must

Figure 17. Power-supply connector CN16 (front view)



UM2403 Rev 1 39/78

77

Connectors UM2403

06Y9





9.1.14 Analog input connector CN17

Figure 18. Analog input-output connector CN17 (top view)

Pin number Description

Table 30. Analog input-output connector CN17

Pin

number

Description

1 Analog input-output PB2 2 GND

9.2 Connectors on legacy peripheral daughterboard

9.2.1 HDMI sink connector CN1

Figure 19. HDMI sink connector CN1 (front view)

Table 31. HDMI sink connector CN1

Pin number Description Pin number Description

1,3,4,6,7,9,10,12

TMDS differential signal pair
connected to CN3

16 I2C2_SDA (PB14)

13 CEC (PB10) 2,5,8,11,17 GND

14 NC 18 HDMI_5V_Sink

15 I2C2_SCL (PB13) 19 HPD (PD2 through transistor)

40/78 UM2403 Rev 1

UM2403 Connectors

06Y9







 

9.2.2 Smartcard connector CN2

Figure 20. Smartcard connector CN2 (top view)

Pin number Description

Table 32. Smartcard connector CN2

Pin

number

Description

1 VCC 5 GND

2RST 6NC

3 CLK 7 I/O

4NC 8NC

17 Card presence detection pin 18 Card presence detection pin

UM2403 Rev 1 41/78

77

Connectors UM2403

9.2.3 HDMI source connector CN3

Figure 21. HDMI source connector CN3 (front view)

Pin number Description Pin number Description

1,3,4,6,7,9,10,12

13 CEC (PB10) 2,5,8,11,17 GND

14 NC 18

15 I2C1_SCL (PB6) 19 HPD (PD3)

Table 33. HDMI source connector CN3

TMDS differential signal pair
connected to CN1

16 I2C1_SDA (PB7)

9.2.4 Daughterboard female connector CN4 and CN5

Two female connectors CN4 and CN5 are used to implement the legacy peripheral
daughterboard on the mother board. CN4 on legacy daughterboard is connected to CN5 on
mother board, and CN5 on legacy daughterboard is connected to CN4 on mother board.
Please refer to

Section 9.1.3 for detail signal definition of these connectors.

9.3 Connectors on UCPD daughterboard

9.3.1 USB Type A connector CN1

HDMI_5V_Source from power
switch U3

Figure 22. USB Type A connector CN1 (front view)

Pin number Description Pin number Description

1 VBUS (power) 3 D+

2D- 4GND

42/78 UM2403 Rev 1

Table 34. USB Type A connector CN1

UM2403 Connectors

9.3.2 DisplayPort source connector CN2

Figure 23. DisplayPort source connector CN2 (front view)

Pin number Description Pin number Description

1 LANE0_P 13 CONFIG1

3 LANE0_N 14 CONFIG2

4 LANE1_P 15 AUX_CH_P

6 LANE1_N 17 AUX_CH_N

7 LANE2_P 18 HPD (PC6)

9 LANE2_N 19 RETURN

10 LANE3_P 20 DP_PWR

12 LANE3_N 2,5,8,11,16 GND

Table 35. DisplayPort source connector CN2

9.3.3 19 V Power connector CN3

The UCPD daughterboard can be powered from a DC 19 V power supply via the external
power supply jack (CN3) shown in

Figure 24. 19 V Power connector CN3 (front view)

Figure 24. And it is used for USB PD.

UM2403 Rev 1 43/78

77

Connectors UM2403

9.3.4 USB3.1 Gen1 Type B connector CN4

Figure 25. USB3.1 Gen1 Type B connector CN4 (front view)

Table 36. USB3.1 Gen1 Type B connector CN4

Pin number Description Pin number Description

1 VBUS (power) 5 SSTX-

2 D- 6 SSTX+

3 D+ 7 GND_DRAIN

4 GND 8 SSRX-

- - 9 SSRX+

9.3.5 USB Type-C connector PORT2 CN5

Figure 26. USB Type-C connector PORT2 CN5 (front view)

Table 37. USB Type-C connector PORT2 CN5

Pin number Description Pin number Description

A1 GND B1 GND

A2 TX1+ B2 TX2+

A3 TX1- B3 TX2-

A4 VBUS B4 VBUS

A5 CC1 (PD0) B5 CC2 (PD2)

A6 D+ B6 D+

A7 D- B7 D-

44/78 UM2403 Rev 1

UM2403 Connectors

Table 37. USB Type-C connector PORT2 CN5 (continued)

Pin number Description Pin number Description

A8 SBU1 B8 SBU2

A9 VBUS B9 VBUS

A10 RX2- B10 RX1-

A11 RX2+ B11 RX1+

A12 GND B12 GND

9.3.6 Display port sink connector CN6

Figure 27. DisplayPort sink connector CN6 (front view)

Table 38. DisplayPort sink connector CN6

Pin number Description Pin number Description

1 LANE3_N 13 CONFIG1

3 LANE3_P 14 CONFIG2

4 LANE2_N 15 AUX_CH_P

6 LANE2_P 17 AUX_CH_N

7 LANE1_N 18 HPD (PB5)

9 LANE1_P 19 RETURN

10 LANE0_N 20 DP_PWR

12 LANE0_P 2,5,8,11,16 GND

UM2403 Rev 1 45/78

77

Connectors UM2403

9.3.7 USB Type-C connector PORT1 CN7

Figure 28. USB Type-C connector PORT1 CN7 (front view)

Pin number Description Pin number Description

A1 GND B1 GND

A2 TX1+ B2 TX2+

A3 TX1- B3 TX2-

A4 VBUS B4 VBUS

A5 CC1 (PA8) B5 CC2 (PB15)

A6 D+ B6 D+

A7 D- B7 D-

A8 SBU1 B8 SBU2

A9 VBUS B9 VBUS

A10 RX2- B10 RX1-

A11 RX2+ B11 RX1+

A12 GND B12 GND

Table 39. USB Type-C connector PORT1 CN7

9.3.8 Daughterboard female connector CN8 and CN9

Two female connectors CN8 and CN9 are used to implement the UCPD daughterboard on
mother board. CN8 on UCPD the daughterboard is connected to CN5 on the mother board,
and CN9 on the UCPD daughterboard is connected to CN4 on the mother board. Please
refer to

Section 9.1.3 for detail signal definition of these connectors.

46/78 UM2403 Rev 1

UM2403 Electrical schematics

Appendix A Electrical schematics

This chapter provides design schematics for the STM32G081B-EVAL key features to help
users to implement these features in application designs:

• Figure 29: STM32G081B-EVAL mother board top on page 48

• Figure 30: STM32G081B-EVAL MCU on page 49

• Figure 31: STM32G081B-EVAL power on page 50

• Figure 32: STM32G081B-EVAL audio on page 51

• Figure 33: STM32G081B-EVAL LCD microSD on page 52

• Figure 34: STM32G081B-EVAL motor-control on page 53

• Figure 35: STM32G081B-EVAL peripherals on page 54

• Figure 36: STM32G081B-EVAL RS232 and RS485 on page 55

• Figure 37: STM32G081B-EVAL extension connectors on page 56

• Figure 38: STM32G081B-EVAL ST-LINK V2-1 on page 57

• Figure 39: STM32G081B-EVAL SWD on page 58

• Figure 40: STM32G081B-EVAL legacy peripheral daughterboard on page 59

• Figure 41: STM32G081B-EVAL legacy peripheral daughterboard HDMI and CEC on

page 60

• Figure 42: STM32G081B-EVAL legacy peripheral daughterboard Smartcard and IR on

page 61

• Figure 43: STM32G081B-EVAL legacy peripheral daughterboard temperature sensor

and LDR on page 62

• Figure 44: STM32G081B-EVAL UCPD daughterboard top on page 63

• Figure 45: STM32G081B-EVAL UCPD daughterboard CC and VCONN on page 64

• Figure 46: STM32G081B-EVAL UCPD daughterboard port1 DP USB3 on page 65

• Figure 47: STM32G081B-EVAL UCPD daughterboard Type-C source con on page 66

• Figure 48: STM32G081B-EVAL UCPD daughterboard port2 DP on page 67Figure 49:

STM32G081B-EVAL UCPD daughterboard Type-C sink con on page 68

• Figure 49: STM32G081B-EVAL UCPD daughterboard Type-C sink con on page 68

• Figure 50: STM32G081B-EVAL UCPD daughterboard USB PD on page 69

• Figure 51: STM32G081B-EVAL UCPD daughterboard power on page 70

• Figure 52: STM32G081B-EVAL UCPD daughterboard source power on page 71

UM2403 Rev 1 47/78

77

48/78 UM2403 Rev 1

212

MB1350_TOP

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Mother board

MB1350B01

31-AUG-17

Variant name is not interpreted until output

Date:

-

Variant:

C14
100nF

C12
100nF

VccA

1

A1

2

A2

3

GND4DIR

5

B2

6

B1

7

VccB

8

U1

SN74LVC2T45DCUT

+3V3

R13

100K

1Mhz clock

24Mhz clock

MicroSD_CS_3V3

LCD_CS_3V3
SDcard_detect

RESET#

SPI1_MISO_3V3

SPI1_MOSI

SPI1_MOSI_DIR

SPI1_SCK

U_LCD_MicroSD
LCD_MicroSD.SchDoc

USART1_RX_3V3

Bootloader_BOOT0_3V3
Bootloader_RESET_3V3

USART1_CTS_3V3

USART1_RX_BOOT_3V3

USART1_RTS

USART1_TX
USART1_TX_BOOT

U_RS232_RS485
RS232_RS485.SchDoc

STLK_RX
STLK_TX

TMS/SWDIO

TCK/SWCLK

T_SWDIO_IN

RESET#

U_ST_LINK_V2-1
ST_LINK_V2-1.SCHDOC

RESET#

SWDAT

SWCLK

U_SWD
SWD.SchDoc

Potentiometer

LED4

LED3

LED1
LED2

Tamper_key
JOY_SEL

JOY_DOWN
JOY_LEFT
JOY_RIGHT

JOY_UP

EX_RESET

I2C1_SCL
I2C1_SDA

U_Peripherals
Peripherals.SchDoc

RESET#

LED4

LED3

LED1
LED2

Bootloader_BOOT0

Bootloader_RESET

JOY_SEL

MC_BusVoltage

MC_CurrentA

Audio_OUT_L
Audio_OUT_R

SPI1_SCK

Potentiometer

SWCLK

USART1_TX_BOOT

MC_EnA

USART1_RX_BOOT

Audio_IN

SPI1_MOSI_DIR

MC_EnB

I2C1_SCL

I2C1_SDA

MC_EnIndex

MC_DissipativeBrake

MC_EmergencySTOP

SDcard_detect

MC_PFCsync1

LCD_CS_OD

MicroSD_CS_OD

JOY_UP

JOY_DOWN

MC_HeatsinkTemperature

MC_CurrentC

MC_CurrentB

MC_PFCsync2

MC_PFCpwm

Tamper_key

USART1_CTS

USART1_RTS

USART1_TX

USART1_RX

EX_RESET_OD

JOY_LEFT

JOY_RIGHT

MC_NTC

MC_UH

MC_UL

MC_WL

MC_VH

MC_VL

MC_WH

SPI1_MISO

SPI1_MOSI

SWDAT

VREF+

PA[0..15]
PB[0..15]
PC[0..15]
PD[0..6]

PF[0..4]

PD[8..9]

VCP_TX
VCP_RX

U_MCU
MCU.SchDoc

VDD

VDD

U_Power
Power.SchDoc

MC_EmergencySTOP
MC_CurrentA
MC_CurrentB
MC_CurrentC

MC_PFCsync1
MC_PFCsync2

MC_WL

MC_VH

MC_VL

MC_UH

MC_UL

MC_WH
MC_NTC
MC_DissipativeBrake
MC_PFCpwm

MC_EnA
MC_EnB

MC_HeatsinkTemperature
MC_BusVoltage

MC_EnIndex

U_Motor Control
Motor Control.SchDoc

SB5

SB4

PA[0..15]
PB[0..15]
PC[0..15]

PD[0..6]

PF[0..4]

PD[8..9]

RESET#

U_Extension connectors
Extension connectors.SchDoc

Audio_IN

Audio_OUT_L
Audio_OUT_R

U_Audio
Audio.SchDoc

Figure 29. STM32G081B-EVAL mother board top

Electrical schematics UM2403

Figure 30. STM32G081B-EVAL MCU

312

MCU

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Mother board

MB1350B01

31-AUG-17

Variant name is not interpreted until output

Date:

-

Variant:

1

43

2

B1

TD-0341 [RESET/Black]

C88

100nF

PB5
PB6
PB7

PA4
PA5
PA6
PA7

PA11
PA12

PD0
PD1

PA9
PA10

PD3
PD4
PD5
PD6

PC10
PC11

PB14
PB15

PB10

PC12

RESET#

PB8

PC5

PA0

PB9

PC13

PD8
PD9

PC6
PC7
PC8
PC9

PA1 PC1

PC2
PC3

PD2

PB1
PB2

PA15

PB3

PB0

PC4

PA3

PA13
PA14

PB4

PC0

PA2

PA8

PC14
PC15

RESET#

LED4

LED3

LED1
LED2

Bootloader_BOOT0

Bootloader_RESET

JP12

D4

BAT60JFILM

D5

BAT60JFILM

JOY_SEL

PF2

PF4

PF0
PF1

PB11
PB12
PB13

MC_BusVoltage
MC_CurrentA

Audio_OUT_L
Audio_OUT_R

SPI1_SCK

Potentiometer

SWCLK

USART1_TX_BOOT

MC_EnA

USART1_RX_BOOT

Audio_IN

SPI1_MOSI_DIR

MC_EnB
I2C1_SCL
I2C1_SDA

MC_EnIndex

MC_DissipativeBrake

MC_EmergencySTOP

SDcard_detect

PF3

MC_PFCsync1

LCD_CS_OD

MicroSD_CS_OD

JOY_UP

JOY_DOWNMC_HeatsinkTemperature

MC_CurrentC

MC_CurrentB

MC_PFCsync2

MC_PFCpwm

Tamper_key

USART1_CTS
USART1_RTS

USART1_TX
USART1_RX

EX_RESET_OD

JOY_LEFT

JOY_RIGHT

MC_NTC

MC_UH

MC_UL

MC_WL

MC_VH

MC_VL

MC_WH

SPI1_MISO

SPI1_MOSI

SWDAT

R38 0

PF2 - NRST

12

PC0

13

PC1

14

PA6

23

PA7

24

PC4

25

PC5

26

PB2

29

PB10

30

PB11

31

PB12

32

PB15

35

PA8

36

PA9

37

PA15

47

PD3

53

PD4

54

PC11

1

PC12

2

PC13

3

PC14 - OSC32_IN

4

PC15 - OSC32_OUT

5

PF4 - VREF+

7

VDD_1

8

VSS_1

9

PC2

15

PC3

16

PA0

17

PA1

18

PB13

33

PB14

34

PC6

38

PC7

39

PD8[VSS_2]

40

PD9[VDD_2]

41

PA10

42

PA11 [PA9]

43

PA12 [PA10]

44

PA13

45

PA14 - BOOT0

46

PD5

55

PD6

56

PB3

57

PB4

58

PB5

59

PB6

60

PB7

61

PB8

62

PB9

63

PC10

64

PF0 - OSC_IN

10

PF1 - OSC_OUT

11

PA2

19

PC8

48

PD1

51

PD2

52

PA5

22

PA4

21

PF3 - VBAT

6

PD0

50

PB1

28

PA3

20

PC9

49

PB0

27

U7

STM32G0

3

2

1

JP9

X2
NX3215SA-32.768KHZ-EXS00A-MU00525

C34

4.7pF

C35

4.7pF

SB11
SB10 C36

3.9pF

C37

3.9pF

R46

0

R45

0

VDD

BT1
CR1220 holder

1

2

3

JP15

VDD

L1

BEAD(FCM1608KF-601T03)

SB22

SB17

VREF+

VDD_MCUVDD

JP11

VDD_MCU

PA[0..15]

PA[0..15]

PB[0..15]

PB[0..15]

PC[0..15]

PC[0..15]

PD[0..6]

PD[0..6]

PF[0..4]

PF[0..4]

PD[8..9]

PD[8..9]

C33
100nF

VDD_MCU

C31

4.7uF

C32
100nF

VREF+

C39
1uF

C38

10nF

VREF+

TP4
VREF+

VCP_TX
VCP_RX

DB_DET

SB23

1 2

X3
NX3225GD-8.000M-EXS00A-CG04874

R43

0

R44

0

SB14
SB13

R84 0

UM2403 Electrical schematics

UM2403 Rev 1 49/78

412

Power

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Mother board

MB1350B01

31-AUG-17

Variant name is not interpreted until output

Date:

-

Variant:

SV

1

SG

2

CV

3

CG1

4

CG2

5

CG3

6

L2

BNX002-01

C70
220uF

E5V

C56
10uF[ESR<0.2ohm]

VDD_ADJ

+5V TP6

VDD_ADJ

1

3

2

CN16

DC-10B

C79
100nF

1

2

3

U18
ZEN056V130A24LS

13

2

RV2
3386P-503H[5%]

R64

11.8K[1%]

C53

[N/A]

Power Supply VDD_ADJ [1.65V to 3.5V]

R65

22.1K[1%]

C57

4.7uF

Vout=1.22*(1+R1/R2)

considering potentiometer error tolerance

C55
100nF

R79
[N/A]

VDD

JP13

VDD_ANA

3

2

1

JP16

TP5
VDD

VDD_PG

+3V3

VDD_ADJ

TP10
5V

+5V

R71

1K

1 2

LD7
green

TP11
Ground

E5V
D5V

78
56
34
12

JP17

Header 4X2

EN

1

GND

2

VO

4

ADJ

5

GND

7

VI

6

PG

3

U14
ST1L05BPUR

+5V

+5V TP7

+3V3

C72

4.7uF

C67

[N/A]

R88 20.5K[1%]

R87

11.8K[1%]

C71
10uF[ESR<0.2ohm]

EN

1

GND

2

VO

4

ADJ

5

GND

7

VI

6

PG

3

U16
ST1L05BPUR

Power Supply 3.3V
Vout=1.22*(1+R1/R2)

C64
100nF

+3V3

R91

[N/A]

+3V3_PG

+5V

R80 [N/A]+3V3_PG

C62

[N/A]
TP3
Ground

TP1
Ground

TP12
Ground

VUSB_ST_LINK

U5V_ST_LINK

12

D7
ESDA7P60-1U1M

+5V TP13

+3V3_SD

C92

4.7uF

C94

[N/A]

R116 20.5K[1%]

R117

11.8K[1%]

C95
10uF[ESR<0.2ohm]

EN

1

GND

2

VO

4

ADJ

5

GND

7

VI

6

PG

3

U21
ST1L05BPUR

Power Supply 3.3V
Vout=1.22*(1+R1/R2)

C96
100nF

+3V3_SD

R114

[N/A]

+3V3_SD_PG

+5V

R115 0+3V3_PG

C93
[N/A]

+3V3

SB46

SB47

+3V3_SD

50/78 UM2403 Rev 1

Figure 31. STM32G081B-EVAL power

Electrical schematics UM2403

UM2403 Rev 1 51/78

512

Audio

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Mother board

MB1350B01

31-AUG-17

Variant name is not interpreted until output

Date:

-

Variant:

C47

180pF

C51

100nF

R66
100K

R69
100K

TP9
MIC_OUT

TP8

MIC+

R74
1K

R72

100

R73

2.2K

C54
47pF

R67

15K

13

2

RV1
[N/A]

C46
[N/A]

R62 0

R61

510

Audio_IN

4

3

1

2 5

U12
TS461CLT

C61

10uF

C59

4.7uF

C60

2.2uF

R68
18K

R59 82K

R70
680

C58

4.7uF

PA6

VDD_ANA

VDD_ANA

VDD_ANA

C50

100nF

R108
10K

JP18

C69
1uF

C66

330nF

R89

20K

Audio_OUT_L

C65
[N/A]

C80

330nF

R95

20K

Audio_OUT_R

R93

0

C78
[N/A]

R90

4.7K

C73

1.5nF

R94

4.7K

C76

1.5nF

C68

220uF

R86
1K

C77

220uF

R92
1K

C75
1uF

Default setting: close

C74
100nF

VDD_ANA

VDD_ANA

VDD_ANA>2.2V

VDD_ANA>2.7V

PA4

PA5

3

2

1

JP6

Shutdown

6

Bypass

4

VIN2

7

VIN1

3

VOUT1

2

VCC

1

GND

5

VOUT2

8

9

U17

TS488IQT

JP4

2

6

4

3

CN15

PJ3028B-3

Left
Right
Microphone

13245

6

D6
ESDA6V1BC6

JP19

Figure 32. STM32G081B-EVAL audio

UM2403 Electrical schematics

52/78 UM2403 Rev 1

612

LCD_MicroSD

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Mother board

MB1350B01

31-AUG-17

Variant name is not interpreted until output

Date:

-

Variant:

MicroSD_CS_3V3

LCD_CS_3V3

SDcard_detect

CS

1

SCL

2

SDI

3

RS

4

WR

5

RD

6

RESET

8

VDD

9

VCI

10

SDO

7

GND

11

GND

12

BL_VDD

13

BL_Control

14

BL_GND

15

BL_GND

16

CN14

2.4" LCD connector (MB895C)

TFT LCD

PC9

+5V

C82
10uF

L3

BEAD

C81
100nF

L4

BEAD

R96 0
R100 [N/A]

R60
10K

R34
10K

RVS

1

CS

2

DI

3

Vdd

4

SCLK

5

Vss

6

DO

7

RVS

8

SW2

9

SW1

10

CN8

PJS008-2000 (SMS064FF or SMS128FF)

PB8

PD1

RESET#

VDD

R75

4.7K

R76 270

R78

10K

R63
270

Open drain pin!

Open drain pin!

SPI LCD

SPI MICRO SD

SPI1_MISO_3V3

PB4

SPI1_MOSI

PA7

VCCA

1

A1

2

A2

3

GND4DIR

5

B2

6

B1

7

VCCB

8

U10

SN74LVC2T45DCUT

VDD

VDD

C40
100nF

C42
100nF

SPI1_MOSI_3V3

SPI1_MOSI_DIR

R56 10K

PC12

SPI1_SCK

VCCA

1

A1

2

A2

3

GND4DIR

5

B2

6

B1

7

VCCB

8

U11

SN74LVC2T45DCUT

VDD

VDD

C43
100nF

C41
100nF

SPI1_SCK_3V3

PB3

R57
100K

VDD

SPI1_MOSI_3V3

SPI1_SCK_3V3

WP/CD

1

RDAT3_GND

2

DAT2_IN

3

DAT3_IN

4

CMD_IN

5

CLK_IN

6

DAT0_IN

7

DAT1_IN

8

DAT1_EX

9

DAT0_EX

10

CLK_EX

11

CMD_EX

12

DAT3_EX

13

DAT2_EX

14

VCC

15

RDATA_VCC

16

GND

17

U6

EMIF06-MSD02N16

SB8

SB12

SB9

SB27

SB24

SB26

SB25

SB15

1

2 3

G

SD

T2
BSN20

+3V3_SD

+3V3_SD

+3V3_SD

+3V3_SD

+3V3_SD

+3V3_SD

+3V3_SD

+3V3_SD

+3V3_SD

Figure 33. STM32G081B-EVAL LCD microSD

Electrical schematics UM2403

712

Motor Control

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Mother board

MB1350B01

31-AUG-17

Variant name is not interpreted until output

Date:

-

Variant:

C5
1nF

+3V3

+5V

R2

0

C10

100nF

C6
100nF

R6 0
C9
[N/A]

C8
[N/A]

C7
[N/A]

C4
[N/A]

C11
10nF

C2
[N/A]

C3
[N/A]

R5 0

R4 0

R7

0

R3

0

EMERGENCY STOP

1

MC-UH

3

MC_UL

5

MC_VH

7

MC_VL

9

MC_WH

11

MC_WL

13

CURRENT A

15

CURRENT C

19

CURRENT B

17

NTC BYPASS RELAY

21

DISSIPATIVE BRAKE

23

+5V POWER

25

PFC SYNC

27

PFC PWM

29

Encoder A

31

Encoder B

33

GND

2

GND

4

GND

6

GND

8

GND

10

GND

12

BUS VOLTAGE

14

GND

16

GND

18

GND

20

GND

22

GND

24

Heatsink Temperature

26

3.3V Power

28

GND

30

GND

32

Encoder Index

34

CN1

MC_connector

MC_EmergencySTOP

MC_CurrentA

MC_CurrentB

MC_CurrentC

MC_PFCsync1

MC_PFCsync2

MC_WL

MC_VH
MC_VL

MC_UH
MC_UL

MC_WH

MC_NTC
MC_DissipativeBrake

MC_PFCpwm
MC_EnA
MC_EnB

MC_HeatsinkTemperature

MC_BusVoltage

MC_EnIndex

R8
100K

C1
[N/A]

Motor control connector

Default setting: Open

PB12

PA8
PD2
PA9
PD3
PA10
PD4

PB15

PB5

PB10

PA1

PC1

PB1

PA6

PD0

PA2

PA3

R1

3.3K

+3V3

SB1

SB2

JP1

JP2

Default setting: Open

Default setting: Open

JP3

PB9

PB0

PC6

UM2403 Rev 1 53/78

Figure 34. STM32G081B-EVAL motor-control

UM2403 Electrical schematics

812

Peripherals

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Mother board

MB1350B01

31-AUG-17

Variant name is not interpreted until output

Date:

-

Variant:

13

2

RV3
10K

Potentiometer

Potentiometer

1 2

LD3
Red

1 2

LD2
Orange

1 2

LD4
Blue

1 2

LD1
Green

+3V3

R104

510

R103

680

R102

680

R101

680

LED4

LED3

LED1

LED2

LEDs

Tamper Button

PD5

PD6

PD8

PD9

C90
[N/A]

R1110

Close to MCU on PCB

PB2

R1130

CN17

two pin header for external analog input

R109

4.7K

1

4 3

2

B2
Tamper

C89
100nF

VDD

R110

100

Tamper_key

PC13

R11247

VDD_ANA

C91
100nF

VDD

C87 100nF

C86 100nF

C85 100nF

C83 100nF

C84 100nF

R106

100

COMMON

5

Selection

2

DOWN

3

LEFT

1

RIGHT

4

UP

6

GND

7

GND

8

B3

MT-008A

JOY_SEL
JOY_DOWN
JOY_LEFT
JOY_RIGHT
JOY_UP

Joystick

PC2

PC7

PC8

PC3

PA0

Input pins with pull-down

VDD

+3V3

R99

1K[1%]

R97

4.53K[1%]

+3V3

+3V3

6

5

7

U19B

TS3702IPT

2

3

1

4 8

U19A

TS3702IPT

12

LD8
Orange

VDD<2.7V

R105 0

R98

0

R83
510

Low Voltage LED

IOs and some Analog IPs will work with degraded performances

EX_RESET

PC0

R12
10K

EXT_I2C_PWR

Open drain pin!

1 2
3 4
5 6
7 8

CN2

F206A-2*04MGF-A

SSM-104-L-DH (Samtec)

I2C1_SCL

I2C1_SDA

R10
10K

I2C_PU

R9
10K

I2C extension connector

VDD

R107 0D9

ESDALC6V1-1U2

PB7
PB6

SB43

SB36

SB35

SB34

SB33

SB42

SB38
SB37
SB39
SB40
SB41

EXT_I2C_PWR

1

3

2 4

5

6

D8
ESDA6V1-5SC6

54/78 UM2403 Rev 1

Figure 35. STM32G081B-EVAL peripherals

Electrical schematics UM2403

912

RS232_RS485

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Mother board

MB1350B01

31-AUG-17

Variant name is not interpreted until output

Date:

-

Variant:

1
6
2
7
3
8
4
9
5

CN11
DB9-male USART1

USART1_RX_3V3

connector for USART1 & RS485

R81
10K

R77

22K

R85

22K

R82

120

C63

100nF

Bootloader_BOOT0_3V3

Bootloader_RESET_3V3

C2+

1

C2-

2

V-

3

R1IN

4

R2IN

5

R3IN

6

R4IN

7

R5IN

8

T1OUT

9

T2OUT

10

T3OUT

11

T3IN

12

T2IN

13

T1IN

14

R5OUT

15

R4OUT

16

R3OUT

17

R2OUT

18

R1OUT

19

R2OUTB

20

R1OUTB

21

nSHDN

22

nEN

23

C1-

24

GND

25

VCC

26

V+

27

C1+

28

U13

ST3241EBPR

C49

100nF

C45

100nF

C52
100nF

C48
100nF
C44
100nF

+3V3

+3V3

RXD
RTS
TXD
CTS

DSR

USART1_CTS_3V3

PA11

RO

1

RE

2

DE

3

DI4GND

5

A

6

B

7

Vcc

8

U15

ST3485EBDR

+3V3

PA10

3

2

1

JP10

3

2

1

JP8

USART1_RX_BOOT_3V3

PC5

USART1_RTS_3V3

USART1_RTS

PA12

VCCA

1

A1

2

A2

3

GND4DIR

5

B2

6

B1

7

VCCB

8

U8

SN74LVC2T45DCUT

+3V3VDD

VDD

C29
100nF

C30
100nF

R40
100K

R42
100K

VDD

USART1_TX

PC4

PA9

USART1_TX_BOOT

USART1_TX_3V3

USART1_TX_3V3

USART1_RTS_3V3

RS485_DIR

RS485_DIR

3

2

1

JP14

SB28

SB16

SB29

SB31

SB32

SB30

USART1_RTS_3V3

UM2403 Rev 1 55/78

Figure 36. STM32G081B-EVAL RS232 and RS485

UM2403 Electrical schematics

56/78 UM2403 Rev 1

10 12

Extension connectors

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Mother board

MB1350B01

31-AUG-17

Variant name is not interpreted until output

Date:

-

Variant:

PA4

PA5 PA6

PA7

PA11

PA12

PA0

PA1
PA15

PA3

PA13

PA14

PB6
PB7

PB14

PB10

PB8

PB1

PB2

PB4

PB11

PB12

PB13

PB3

PC10 PC11 PC12

PC5

PC13

PC6

PC7

PC8

PC9

PC2

PC3PC4

PC0

PC14

PC15

PD1
PD5
PD6

PD8 PD9

PF2

PF4

PF0

PF1

PF3

PA[0..15]

PA[0..15]

PB[0..15]

PB[0..15]

PC[0..15]

PC[0..15]

PD[0..6]

PD[0..6]

PF[0..4]

PF[0..4]

PD[8..9]

PD[8..9]

SOURCE_EN

DISCHARGE_1
DISCHARGE_2
VSENSE_1
ISENSE_1

DB_DET DB_DET

+3V3

HPDIN

USB3_DET
I2C1_SCL
I2C1_SDA

RESET(Mother board)

ISENSE_2

VSENSE_2

VDD

I2C_PU

USB-C daugher board signal Legacy daugher board signal

IR_IN
I2C2_SCL
I2C2_SDA

HDMI_CEC

LDR_OUT
SMART_RST

RESET(Mother board)

SMART_OFF

SMART_1V8

I2C1_SCL
I2C1_SDA

R11 820

R26 10K

RESET#

D5V

VDD

SB20

SB21

+3V3

R47 820

SB18

SB19

Daugher board connectors

Extension connectors

VDD_ANA

R41 820

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18

CN4

Header 18X1

R39 10K

BOOT0

1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22

CN10

Header 11X2

1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22

CN9

Header 11X2

PA9
PA10

PA2

PA8

PB5

PB15

PB9

PB0

PC1
PD0

PD3

PD4

PD2

PORT1_CC1

PORT1_DB1

VCONN_EN1
VCONN_EN2
FRS_TX1

V_CTRL2

V_CTRL1

PORT1_CC2

PORT1_DB2

FRS_TX2

USB-C daugher board signalLegacy daugher board signal

PORT2_CC1
PORT2_CC2

HPD_SOURCE

D5V

VDD

SMART_CK
IR_OUT
SMART_TX

TEMP_SENSOR_INT

SMART_3/5V

SMART_CMDVCC

HDMI_HPD_SINK
HDMI_HPD_SOURCE

+5V

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

CN5

Header 18X1

EXT_I2C_PWR

SB44
SB45

Note: If no daugher board on CN4 & CN5, close pin17 &18 of CN4 & CN5 by jumpers when using I2C extension connector CN2

Figure 37. STM32G081B-EVAL extension connectors

Electrical schematics UM2403

11 12

ST_LINK_V2-1

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Mother board

MB1350B01

31-AUG-17

Variant name is not interpreted until output

Date:

-

Variant:

STM_RST

T_JTCK

T_JTCK

T_JTDO

T_JTDI

T_JTMS

OSC_IN
OSC_OUT

T_NRST

AIN_1

COM

PWR

Board Ident: PC13=0

SWD

T_SWDIO_IN

LED_STLINK
MCO

CN3
[N/A]

TX
RX

STLINK_RX

STLK_RX

STLK_TX

STLINK_TX

T_SWO

R25
[N/A]

R17
100K

R24
10K

R14 4.7K

R15 4.7K

C16
100nF

D5V

USB_RENUMn

+3V3_ST_LINK

+3V3_ST_LINK

+3V3_ST_LINK

+3V3_ST_LINK

PWR_EXT

+3V3_ST_LINK

C26

1uF_X5R_0603

C24
10nF_X7R_0603

C23
1uF_X5R_0603

C27
100nF

C22
100nF

+3V3_ST_LINK

VBAT

1

PA7

17

PC13

2

PA12

33

PC14

3

PB0

18

PC15

4

JTMS/SWDIO

34

OSCIN

5

PB1

19

OSCOUT

6

VSS_2

35

NRST

7

PB2/BOOT1

20

VSSA

8

VDD_2

36

VDDA

9

PB10

21

PA0

10

JTCK/SWCLK

37

PA1

11

PB11

22

PA2

12

PA15/JTDI

38

PA3

13

VSS_1

23

PA4

14

PB3/JTDO

39

PA5

15

VDD_1

24

PA6

16

PB4/JNTRST

40

PB12

25

PB5

41

PB13

26

PB6

42

PB14

27

PB7

43

PB15

28

BOOT0

44

PA8

29

PB8

45

PA9

30

PB9

46

PA10

31

VSS_3

47

PA11

32

VDD_3

48

U2
STM32F103CBT6

R16
100K

PWR_ENn

+3V3_ST_LINK

1 2
3 4
5

CN7

[N/A]

C20
100nF

C13
100nF

C15
100nF

C21
100nF

+3V3_ST_LINK

VUSB_ST_LINK

LED_STLINK

21

4 3

Red Yellow

LD6
HSMF-A201-A00J1

R35
100

R36
100

R37
0

+3V3_ST_LINK

T_JTCK

T_NRST

T_JTMS

TMS/SWDIO

TCK/SWCLK

T_SWDIO_IN

RESET#

T_SWDIO_IN

STM_JTMS_SWDIO
STM_JTCK_SWCLK

STM_JTMS_SWDIO

STM_JTCK_SWCLK

D2

BAT60JFILM

D3

BAT60JFILM

T_JRST

SWIM_PU_CTRL

STL_USB_DM

STL_USB_DP

R23

100K

R28

2.7K

R27

4.7K

+3V3_ST_LINK

+5V

PC11

PC10

C28

4.7uF

VUSB_ST_LINK U5V_ST_LINK

R31 100K

C25
100nF

D1

BAT60JFILM

JP5

1 2

LD5

Red

R33

1K

USB ST-LINK

R18

1.5K

R19
100K

USB_RENUMn

R21
10K

R20
36K

R22 100

+3V3_ST_LINK

I/O1

1

GND

2

I/O23I/O2

4

Vbus

5

I/O1

6

U3

USBLC6-2SC6

C17
100nF

i

Diff Pair 90ohm

i

Diff Pair 90ohm

VBUS

1

DM

2

DP

3

ID

4

GND

5

Shield

6

USB_Micro-B receptacle

Shield

7

Shield

8

Shield

9

EXP

10

EXP

11

CN6

1050170001

3

1

2

T1
9013

VUSB_ST_LINK

VUSB_ST_LINK

VUSB_ST_LINK

STL_USB_DM
STL_USB_DP

51

2

GND

3

4

BYPASS

EN

Vin Vout

U4 LDK120M33R

C19
10pF

C18
10pF

1 2

X1

NX3225GD-8.000M-EXS00A-CG04874

VDD

SB6

SB7

TP2
PB10

PA14

PA13

PA13

SB3

JP7

R32
10K

D10

BAT60JFILM

E5V

GND

2

IN

5

EN

4

OUT

1

FAULT

3

STMPS2141STR

U5

U4 can be replaced by LD3985M33R

UM2403 Rev 1 57/78

Figure 38. STM32G081B-EVAL ST-LINK V2-1

Power Switch to supply +5V
from STLINK USB

UM2403 Electrical schematics

58/78 UM2403 Rev 1

12 12

SWD

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Mother board

MB1350B01

31-AUG-17

Variant name is not interpreted until output

Date:

-

Variant:

R49
[N/A]

R51
[N/A]

R53
[N/A]

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

CN12
SWD

R55 10K

R58 10K

R52
10K

RESET#

SWDAT
SWCLK

High Density SWD connector

Standard SWD connector

KEY

PA13
PA14

R48 22
R50 22
R54 22

1

2

3

4

5

6

7

8

9

10

CN13
FTSH-105-01-L-DV

VDD

VDD

VDD

1

324

5

U9

ESDALC6V1W5

VDD

Figure 39. STM32G081B-EVAL SWD

Electrical schematics UM2403

Figure 40. STM32G081B-EVAL legacy peripheral daughterboard

25

MB1351_TOP

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Legacy peripheral daughter board

MB1351A01

17-MAY-17

Variant name is not interpreted until output

Date:

-

Variant:

DB_DET

Legacy daugher board signal

+3V3

VDD VDD

PD4
PB9
PA2

PB5

PC6
PB13
PB14

PB10

PB15

PB0

LDR_OUT
SMART_RST

HDMI_HPD_SINK

RESET(Mother board)

SMART_OFF

SMART_1V8

I2C1_SCL
I2C1_SDA

HDMI_HPD_SOURCE

R21 20K

VDD_ANA

HDMI_HPD_SINK

I2C2_SDA_5V

I2C2_SCL_5V

HDMI_CEC_3V3

HDMI_HPD_Source_5V

I2C1_SCL_5V
I2C1_SDA_5V

U_HDMI_CEC
HDMI_CEC.SchDoc

SmartCard_3/5V

SmartCard_IO

SmartCard_RST

SmartCard_CLK

SmartCard_OFF

SmartCard_CMDVCC

IR_OUT

IR_IN

SmartCard_1V8

U_SmartCard_IR
SmartCard_IR.SchDoc

I2C1_SCL_5V

I2C1_SDA_5V

TempSensor_INT

LDR_OUT

U_TemSensor_LDR
TemSensor_LDR.SCHDOC

SmartCard_3/5V

SmartCard_CLK
SmartCard_IO
SmartCard_CMDVCC

SmartCard_1V8
SmartCard_RST
SmartCard_OFF

IR_IN
IR_OUT

I2C1_SCL_5V
I2C1_SDA_5V
TempSensor_INT

LDR_OUT

HDMI_HPD_Source_5V
HDMI_HPD_SINK
HDMI_CEC_3V3

I2C1_SCL_5V
I2C1_SDA_5V

I2C2_SCL_5V
I2C2_SDA_5V

SMART_CK
IR_OUT
SMART_TX

IR_IN
I2C2_SCL
I2C2_SDA

HDMI_CEC

SMART_3/5V

SMART_CMDVCC

PA1
PA15

PD2

PB12

PA3

PB6
PB7

PD3

SmartCard_3/5V

SmartCard_CLK

SmartCard_IO
SmartCard_CMDVCC

SmartCard_1V8

SmartCard_RST

SmartCard_OFF

IR_IN IR_OUT

I2C1_SCL_5V
I2C1_SDA_5V

TempSensor_INT

LDR_OUT

HDMI_HPD_Source_5V

HDMI_HPD_SINK

HDMI_CEC_3V3

I2C2_SCL_5V
I2C2_SDA_5V

SB8

+5V

RST_PU_POWER

+5V

+3V3

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

CN4

Header 18X1_Female

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18

CN5

Header 18X1_Female

C13
100nF

C14
100nF

VDD

C8
100nF

+3V3

C4
100nF

+5V VDD_ANA

C10
100nF

UM2403 Electrical schematics

UM2403 Rev 1 59/78

60/78 UM2403 Rev 1

35

HDMI_CEC

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Legacy peripheral daughter board

MB1351A01

17-MAY-17

Variant name is not interpreted until output

Date:

-

Variant:

HDMI_HPD_SINK

Sink

Source

R20
1K

R7
1K

HDMI_5V_Sink

HDMI_5V_Sink

I2C2_SDA_5V

I2C2_SCL_5V

R9
47K

R10
47K

+3V3

R18

27K

HDMI_CEC_3V3

+5V

C2

4.7uF

GND

2

IN

5

EN

4

OUT

1

FAULT

3

U1

STMPS2141STR@54

HDMI_5V_Source

R22
1M

HDMI_HPD_Source_5V

I2C1_SCL_5V
I2C1_SDA_5V

R4

1.8KR31.8K

+5V

R15
0

+5V

PD2

PB13
PB14
PB10

PD3

PB6
PB7

TMDS_Data2+

TMDS_Data2­TMDS_Data1+

TMDS_Data1­TMDS_Data0+

TMDS_Data0­TMDS_Clock+

TMDS_Clock-

R8

1K

FT pin & Open Drain mode needed

Open drain pin!

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19

22

20

21

CN3

HD119F-3A09200

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

22

20

21

CN1

HD119F-3A09200

SB3
SB4

SB5
SB6

3

1

2

T1
9012

2

1

3

G

SD

T4
2N7002

Figure 41. STM32G081B-EVAL legacy peripheral daughterboard HDMI and CEC

Electrical schematics UM2403

Figure 42. STM32G081B-EVAL legacy peripheral daughterboard Smartcard and IR

45

SmartCard_IR

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Legacy peripheral daughter board

MB1351A01

17-MAY-17

Variant name is not interpreted until output

Date:

-

Variant:

VCC

1

RST

2

CLK

3

NC

4

GND

5

NC

6

I/O

7

NC

8

18

17CN2

C816

C9 100nF

C6
100nF

C3
47uF

+5V

C5 100nF

C12

100nF

R16

100K

R17

4.7K

R25
10K[N/A]

R24
10K[N/A]

C11
100nF

C15
47uF

R27
10K

R26
10K

TP2
AUX2
TP1
AUX1

SmartCard_3/5V

SmartCard_IO

SmartCard_RST

SmartCard_CLK
SmartCard_OFF

SmartCard_CMDVCC

PA15

PB12

PD4

PA2

PB0

PB15

IR_OUT

R6
22

+3V3

R5

100

12

LD1
SFH409-2

IR_LED

PB9

VDD

R12

10K

R13
1K

+3V3

2

3

1

D1
TSOP34836

R14

100
C1

4.7uF

IR_IN

PC6

IR

VDD>2.7V

IR_Receiver

CLKDIV1

1

CLKDIV2

2

5V/3V

3

PGND

4

C1+

5

Vddp

6

C1-

7

Vup

8

PRES

9

PRES

10

I/O

11

AUX2

12

AUX1

13

CGND14CLK

15

RST

16

Vcc

17

PORADJ/1.8V

18

CMDVCC

19

RSTIN

20

Vdd

21

GND

22

OFF

23

XTAL1

24

XTAL2

25

I/OUC

26

AUX1UC

27

AUX2UC

28

U2

ST8024LACDR

SmartCard_1V8

PA3

R11
10K

VDD

VDD

VDD

VDD

VDD

Smart Card

SB2

SB1

3

1

2

T3
9013

3

1

2

T2
9013

UM2403 Electrical schematics

UM2403 Rev 1 61/78

62/78 UM2403 Rev 1

55

TemSensor_LDR

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL Legacy peripheral daughter board

MB1351A01

17-MAY-17

Variant name is not interpreted until output

Date:

-

Variant:

SDA

1

SCL

2

OS/INT

3

GND4A2

5

A1

6

A0

7

VDD

8

U3

STLM75M2F

+5V

C7
100nF

R23
10K

VDD

I2C1_SCL_5V

I2C1_SDA_5V

Temperature sensor

TempSensor_INT

PB7
PB6
PB5

R19
10K

+5V

Address:100100(A0)

LDR_OUT

R2

8.2K

PA1

R1
VT9ON1

Photo resistor

VDD_ANA

SB7

Figure 43. STM32G081B-EVAL legacy peripheral daughterboard temperature sensor and LDR

Electrical schematics UM2403

210

MB1352_TOP

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL USB-C daughter board

MB1352C02

3-Aug-18

Variant name is not interpreted until output

Date:

-

Variant:

Mother board connectors

R107
10K

R106
10K

R120 15K[1%]

+3V3

VDD

PA8

PA9

PB15

D5V

VDD

+5V

PA10

PD4
PB9
PA2
PB0

PB5
PC1

PC6
PB13
PB14
PB1
PB10

SB59

VDD

DB_DET

+3V3

RESET

VDD

PA1
PA15
PB6
PB7

PD0
PD2
PD3

PA3
PB12

PORT1_CC1

PORT1_CC1

PORT1_CC2

PORT1_CC2

PORT1_DB1

PORT1_DB1

PORT1_DB2
VCONN_EN1
VCONN_EN2
FRS_TX1
FRS_TX2

PORT1_DB2

VCONN_EN1
VCONN_EN2
FRS_TX1
FRS_TX2

SOURCE_EN

DISCHARGE_1
DISCHARGE_2
VSENSE_1
ISENSE_1

SOURCE_EN
DISCHARGE_1
DISCHARGE_2
VSENSE_1
ISENSE_1

HPDIN
USB3_DET
I2C_SCL
I2C_SDA

HPDIN

USB3_DET
I2C_SCL
I2C_SDA

RESET#

PORT2_CC1
PORT2_CC2

HPD_SOURCE

VSENSE_2
ISENSE_2

VSENSE_2
ISENSE_2

HPD_SOURCE

RESET#
PORT2_CC1
PORT2_CC2

U_POWER
POWER.SchDoc

SOURCE_EN

VSENSE_1

DISCHARGE_1

ISENSE_1
VSENSE_2
ISENSE_2

DISCHARGE_2

U_USB_PD
USB_PD.SchDoc

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

CN9

Header 18X1_Female

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18

CN8

Header 18X1_Female

C101
100nF

C102
100nF

VDD

C100
100nF

+3V3

C97
100nF

+5V

PORT1_CC1
PORT1_CC2

VCONN_EN1
VCONN_EN2
FRS_TX1
FRS_TX2

CON1_CC1

CON1_CC2
PORT1_DB1
PORT1_DB2

U_CC & VCONN
CC & VCONN.SchDoc

1
2
3
4

CN10

Header 4X1_Female

CON1_D+
CON1_D­CON2_D+
CON2_D-

RFU

I2C_SCL
I2C_SDA

HPDIN

USB3_DET

1_CC1
1_CC2

CON1_D-

CON1_D+

U_PORT1_DP_USB3
PORT1_DP_USB3.SchDoc

I2C_SCL
I2C_SDA

HPD_SOURCE

RESET#
PORT2_CC1
PORT2_CC2

CON2_D-

CON2_D+

U_PORT2_DP
PORT2_DP.SchDoc

CON1_D+
CON1_D-

CON2_D+
CON2_D-

1

3 2

4 5

6

D10

ESDA5V3SC6

PORT1_CC1

PORT1_CC2

PORT2_CC1

PORT2_CC2

V_CTL1
V_CTL2

V_CTL1

V_CTL2

V_CTL2

V_CTL1

VSENSE_DCDC

DCDC_EN

U_SOURCE POWER
SOURCE POWER.SchDoc

DCDC_EN
VSENSE_DCDC

VCC

2

GND

5

S1

4

D

1

SEL

3

S2

6

U7

STG5123

+3V3

C38 100nF

DCDC_EN

R82
[N/A]

VSENSE_DCDC

ADC input PB11
DCDC_EN=0: Daugher board detection:1.32V
DCDC_EN=1: U18 output measurement:0.43V-3.3V

SB24

UM2403 Rev 1 63/78

Figure 44. STM32G081B-EVAL UCPD daughterboard top

UM2403 Electrical schematics

64/78 UM2403 Rev 1

310

CC & VCONN

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL USB-C daughter board

MB1352C02

3-Aug-18

Variant name is not interpreted until output

Date:

-

Variant:

GND

2

IN

5

EN

4

OUT

1

FAULT

3

U10

STMPS2161STR

PORT1_CC1

PORT1_CC2

VCONN_EN1

GND

2

IN

5

EN

4

OUT

1

FAULT

3

U14

STMPS2161STR

VCONN_OUT

VCONN_EN2

1

2 3

G

SD

T12
FDV303N

R113
10K

FRS_TX1

1

2 3

G

SD

T4
FDV303N

R35
10K

FRS_TX2

CON1_CC1

CON1_CC2

TYPE-C Source port CC management

PORT1_DB1

PORT1_DB2

open-drain

open-drain

VCONN_EN1

VCONN_EN2

1

2 3

G

SD

T2
FDV303N

1

2 3

G

SD

T3
FDV303N

SB4 SB5

0.5A

VCONN power

PSU

TP5
VCONN

VCONN_OUT

C45
47uF/25V

SB33

C55

39nF/50V

R117

1.2K

C58

680pF/50V

C74

8.2nF/50V

R74
100

C71

10uF/50V

C65

220nF/50V

R76
187K

D7
STPS3L40S

R75

4.99K

SYNCH

2

FB

5

COMP

4

OUT

1

EN

3

FSW

6

GND

7

VCC

8

GND

9

U21

L7985A

R123
680

0.5A

0.5A

L4

18uH(MSS1246-183MLB)

R8
10K

VDD

R9
10K

VDD

SB9

SB8

D5V

VCONN_EN1

SB12 SB11

VCONN_EN2

D11

BAT60JFILM

D12

BAT60JFILM

R32
330

R33
10K[N/A]

R34
10K[N/A]

3

2

1

JP2

3

2

1

JP1

JP1/JP2
1-2: Dead battery enable (Default)
2-3: Dead battery disable

Figure 45. STM32G081B-EVAL UCPD daughterboard CC and VCONN

Electrical schematics UM2403

Figure 46. STM32G081B-EVAL UCPD daughterboard port1 DP USB3

410

PORT1_DP_USB3

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL USB-C daughter board

MB1352C02

3-Aug-18

Variant name is not interpreted until output

Date:

-

Variant:

VBUS

1

D-

2

D+

3

GND

4

SSTX-

5

SSTX+

6

GND_DRAIN

7

SSRX-

8

SSRX+

9

SHELL

10

SHELL

11

CN4

31930BFBA07BNHF

VCC

1

DPEQ1

2

SSEQ1

3

SSRX-

4

SSRX+

5

VCC

6

SSTX-

7

SSTX+

8

DP0+

9

DP0-

10

SSEQ0/A0

11

DP1+

12

DP1-

13

DPEQ0/A1

14

DP2+

15

DP2-

16

I2C_EN

17

DP3+

18

DP3-

19

VCC

20

FLIP/SCL

21

CTL0/SDA

22

CTL1/HPDIN

23

AUX+

24

AUX-

25

SBU2

26

SBU1

27

VCC

28

CAD_SNK/RSVD1

29

RX1+

30

RX1-

31

HPDIN/RSVD2

32

TX1+

33

TX1-

34

EQ1

35

TX2-

36

TX2+

37

EQ0

38

RX2-

39

RX2+

40

TP

41

U13

TUSB546-DCI

C20 100nF
C19 100nF

C22 100nF
C21 100nF

C23 100nF

C24 100nF

C25 100nF

C36 100nF

C39 100nF

C42 100nF

C44 100nF

C46 100nF

R36 100K

R37 100K

DP_PWR_SINK

C43 100nF
C40 100nF

C26 100nF
C37 100nF

R382MR39

2M

R20 1M
R15 1M

R103
1K

I2C_EN_1

I2C_EN_1

R109
[N/A]

R19
1K

R90

[N/A]

SSEQ0/A0
SSEQ1
DPEQ0/A1
DPEQ1

SSEQ0/A0 SSEQ1

R98
1K

R100
[N/A]

R16
1K

R21
[N/A]

DPEQ0/A1 DPEQ1

R93
[N/A]

I2C address:0b1000100

R99
1K

R97
[N/A]

R102
1K

R108
[N/A]

EQ1

EQ0
EQ1

EQ0

I2C_SCL
I2C_SDA

C95
10uF

C94
100nF

C90
100nF

C91
100nF

C93
100nF

DP sink & USB3.0 (Port1)

HPDIN

HPDIN

HPDIN

R1 10K R2 10K

USB3_DET

R95
1K

ML_LANE0_P

12

GND

11

ML_LANE0_N

10

ML_LANE1_P

9

GND

8

ML_LANE1_N

7

ML_LANE2_P

6

GND

5

ML_LANE2_N

4

ML_LANE3_P

3

GND

2

ML_LANE3_N

1

CONFIG1

13

CONFIG2

14

AUX_CH_P

15

GND

16

AUX_CH_N

17

HPD

18

RETURN

19

DP_PWR

20

SHELL

21

SHELL

22

SHELL

23

SHELL

24

CN6

Display Port Sink(811F20502214)

VDD

VDD VDD VDD VDD VDD VDD VDD

VDD

C1_RX1+
C1_RX1­C1_TX1+
C1_TX1-

1_SBU1
1_SBU2

C1_RX2+
C1_RX2­C1_TX2+
C1_TX2-

SSTX­SSTX+

SSRX­SSRX+

L0_P_1

L0_N_1

L1_P_1

L1_N_1

L2_P_1

L2_N_1

L3_P_1

L3_N_1

AUX_P_1

AUX_N_1

1

3

2

4

5 6

7

8

9

10

U4

HSP051-4M10

SSTX-

SSTX+

SSRX-

SSRX+

1

3

2

4

5 6

7

8

9

10

U12

HSP051-4M10

1

3

2

4

5 6

7

8

9

10

U15

HSP051-4M10

1

3

2

4

5 6

7

8

9

10

U9

HSP051-4M10

HPDIN

1_CC1
1_CC2

1_CC1
1_CC2

C1_D­C1_D+
C1_RX1+
C1_RX1­C1_TX1+
C1_TX1-

1_SBU1
1_SBU2

C1_RX2+
C1_RX2­C1_TX2+
C1_TX2-

U_TYPEC_SOURCE_CON
TYPEC_SOURCE_CON.SchDoc

SB18
SB19

SB20 TP6

CAD_SNK

HPDIN

SB48

TP4
DP_PWR_SINK

Differential pairs 90ohm

Differential pairs 90ohm

Differential pairs 90ohm

Differential pairs 100ohm

Differential pairs 90ohm

Differential pairs 100ohm

L0_P_1

L0_N_1

L1_P_1

L1_N_1

L2_P_1

L2_N_1

L3_P_1

L3_N_1

AUX_P_1

AUX_N_1

R96 1M

+3V3

CON1_D­CON1_D+

SB62
SB63

SB60
SB61

SB6

SB43

+3V3

R11 0

R12 0

R27

1M[N/A]

R26
1M[N/A]

+3V3

UM2403 Electrical schematics

UM2403 Rev 1 65/78

66/78 UM2403 Rev 1

510

TYPEC_SOURCE_CON

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL USB-C daughter board

MB1352C02

3-Aug-18

Variant name is not interpreted until output

Date:

-

Variant:

GND1

A1

TX1+

A2

TX1-

A3

VBUS1

A4

CC1

A5

D+1

A6

D-1

A7

SBU1

A8

VBUS2

A9

RX2-

A10

RX2+

A11

GND2

A12

GND3

B1

TX2+

B2

TX2-

B3

VBUS3

B4

CC2

B5

D+2

B6

D-2

B7

SBU2

B8

VBUS4

B9

RX1-

B10

RX1+

B11

GND4

B12

SHELL

2

SHELL

3

SHELL

4

SHELL

1

GND

B13

GND

B14

PAD

5

PAD

6

CN7

317JD24BZTF3K3C3

1_CC1
1_CC2

VBUS1

TYPE-C DRP port (Port1)

C_SBU2

2

C_CC1

4

C_SBU1

1

VBIAS

3

RPD_G2

6

RPD_G1

7

GND

8

/FLT

9

VPWR

10

CC2

11

C_CC2

5

CC1

12

GND

13

SBU2

14

SBU1

15

D4

16

D3

17

D2

19

D1

20

GND

18

PAD

21

U17

TPD8S300RUKR

C1_D-

C1_D+

C1_RX1+
C1_RX1-

C1_TX1+
C1_TX1-

1_SBU1
1_SBU2

C1_RX2+

C1_RX2-

C1_TX2+

C1_TX2-

C1_RX1+
C1_RX1-

C1_TX1+
C1_TX1-

C1_D-

C1_D+

C1_RX2+

C1_RX2-

C1_TX2+

C1_TX2-

C54 100nF

VDD

R114
100K

C51

1uF_X5R_0603

1

3

2

4

5 6

7

8

9

10

U19

HSP051-4M10

1

3

2

4

5 6

7

8

9

10

U20

HSP051-4M10

C1_TX1+

C1_TX1-

C1_RX1+

C1_RX1-

C1_RX2+

C1_RX2-

C1_TX2+

C1_TX2-

Differential pairs 90ohm

3A

Differential pairs 90ohm

1_CC1

1_CC2
1_SBU1
1_SBU2C1_CC1

C1_CC2

C1_SBU1
C1_SBU2

1_CC1
1_CC2
1_SBU1
1_SBU2

C1_CC1
C1_CC2
C1_SBU1
C1_SBU2

D6
ESDA25P35-1U1M

VBUS1

R126
1K/0.5W

VBUS1

SB54
SB55

SB27
SB28

SB21
SB22

SB56
SB57
SB58
SB53

SB70
SB71C1_D+

C1_D-

C16
1uF[N/A]

VBUS1

13245

6

D5

ESDA25SC6[N/A]

SB25

C112

390pF[N/A]

C113

390pF[N/A]

Figure 47. STM32G081B-EVAL UCPD daughterboard Type-C source con

Electrical schematics UM2403

610

PORT2_DP

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL USB-C daughter board

MB1352C02

3-Aug-18

Variant name is not interpreted until output

Date:

-

Variant:

C27 100nF

IP1+

J2

IP1-

J3

IP2+

H1

IP2-

J1

IP3+

F1

IP3-

G1

IP4+

E1

IP4-

D1

IP5+

C1

IP5-

B1

IP6+

A1

IP6-

A2

OP1+

H6

OP1-

J6

OP2+

D6

OP2-

E6

OP3+

G6

OP3-

F6

OP4+

C6

OP4-

B6

IP7A

A3

IP7B

A4

IP8A

B3

IP8B

B4

OP5A

A5

OP5B

A6

I2C_SCL

J4

I2C_SDA

H4

SLV_ADDR1

H5

SW_EN

J5

VDD

B2

VDD

E3

VDDIO

H3

VDDIO

E4

GND

B5

GND

D3

GND

F3

GND

F4

GND

H2

SLV_ADDR2

D4

U8

CBTL08GP053EVY

IN0_P

1

IN0_N

2

IN1_P

4

IN1_N

5

IN2_P

8

IN2_N

9

IN3_P

11

IN3_N

12

OUT0_P

31

OUT0_N

30

OUT1_P

28

OUT1_N

27

OUT2_P

24

OUT2_N

23

OUT3_P

21

OUT3_N

20

SDA

14

DRV_PK#SCL

15

I2C_EN

16

TX_DC_GAIN/CS

17

REXT

18

EQ0/ADD0

33

EQ_MODE/ADD2

35

RX_GAIN

36

PWD#

37

EQ1/ADD1

34

VCC

3

VCC

6

VCC

7

VCC

10

VCC

13

VCC

19

VCC

22

VCC

25

VCC

26

VCC

29

VCC

32

VCC

38

TP-GND

39

U6

SN65DP141RLJ

R4
1M

R5
1M

SW_EN

I2C address:0b0110000

I2C_SCL

I2C_SDA

I2C_SDA
I2C_SCL

I2C_SDA
I2C_SCL

I2C_EN_2

I2C_EN_2SW_EN

ADDR1
ADDR2

R86
1K

R87
[N/A]

ADDR2

R104
1K

VDD

R105
[N/A]

ADDR1

R28
1K

R29
[N/A]

R91
1K

R23
[N/A]

C28 100nF

C29 100nF
C30 100nF

C31 100nF
C32 100nF

C33 100nF
C34 100nF

C5 100nF
C6 100nF

C7 100nF
C8 100nF

C9 100nF
C10 100nF

C11 100nF
C12 100nF

HPD_SOURCE

CS

R88
1K

R18
[N/A]

CS

A0
A1
A2

R85
1K

R13
[N/A]

A0

R89
1K

R17
[N/A]

A1

R92
1K

R22
[N/A]

A2

I2C address:0b0000000

GAIN

R94
[N/A]

GAIN

R24
[N/A]

PWD#

RESET#

R25

1K[N/A]

R14 1.2K

C35
10uF

C17
100nF

C86
100nF

C88
100nF

C77
100nF

Close to SN65DP141

C82
100nF

C84
100nF

C92
10uF

C80
100nF

C89
100nF

C81
100nF

C87
100nF

Close to CBTL08G

DP source (Port2)

C75
100nF

C76
100nF

C78
100nF

C79
100nF

Close to SN65DP141

C85
100nF

C83
100nF

ML_LANE0_P

1

GND

2

ML_LANE0_N

3

ML_LANE1_P

4

GND

5

ML_LANE1_N

6

ML_LANE2_P

7

GND

8

ML_LANE2_N

9

ML_LANE3_P

10

GND

11

ML_LANE3_N

12

CONFIG1

13

CONFIG2

14

AUX_CH_P

15

GND

16

AUX_CH_N

17

HPD

18

RETURN

19

DP_PWR

20

SHELL

21

SHELL

22

SHELL

23

SHELL

24

CN2

Display Port Source(811F20502214)

VDD VDD VDD VDD VDD VDD VDD VDD

VDD

VDD

VDD

VDD

VDD

DP_PWR_SOURCE

C2_RX1+
C2_RX1-

C2_TX1+
C2_TX1-

C2_RX2+
C2_RX2-

C2_TX2+
C2_TX2-

2_SBU1
2_SBU2

L0_P_2

L0_N_2

L1_P_2

L1_N_2

L2_P_2

L2_N_2

L3_P_2

L3_N_2

AUX_P_2

AUX_N_2

1

3

2

4

5 6

7

8

9

10

U1

HSP051-4M10

1

3

2

4

5 6

7

8

9

10

U2

HSP051-4M10

1

3

2

4

5 6

7

8

9

10

U3

HSP051-4M10

HPD_SOURCE

PORT2_CC1

PORT2_CC2

HPD_SOURCE

SB10
SB7

C13 100nF
C14 100nF

TP1
DP_PWR_SOURCE

Differential pairs 90ohm

Differential pairs 100ohm

Differential pairs 100ohm

L0_P_2

L0_N_2

L1_P_2

L1_N_2

L2_P_2

L2_N_2

L3_P_2

L3_N_2

AUX_P_2

AUX_N_2

R81 1M

+3V3

PORT2_CC1

PORT2_CC2

C2_RX1+

C2_RX1-

C2_TX1+

C2_TX1-

2_SBU2

C2_RX2+

C2_RX2-

C2_TX2+

C2_TX2-

2_SBU1

CON2_D-

CON2_D+

U_TYPEC_SINK_CON
TYPEC_SINK_CON.SchDoc

CON2_D-

CON2_D+

SB40

SB1

R30 100K

R31 100K

+3V3

Figure 48. STM32G081B-EVAL UCPD daughterboard port2 DP

UM2403 Rev 1 67/78

UM2403 Electrical schematics

68/78 UM2403 Rev 1

710

TYPEC_SINK_CON

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL USB-C daughter board

MB1352C02

3-Aug-18

Variant name is not interpreted until output

Date:

-

Variant:

GND1

A1

TX1+

A2

TX1-

A3

VBUS1

A4

CC1

A5

D+1

A6

D-1

A7

SBU1

A8

VBUS2

A9

RX2-

A10

RX2+

A11

GND2

A12

GND3

B1

TX2+

B2

TX2-

B3

VBUS3

B4

CC2

B5

D+2

B6

D-2

B7

SBU2

B8

VBUS4

B9

RX1-

B10

RX1+

B11

GND4

B12

SHELL

2

SHELL

3

SHELL

4

SHELL

1

GND

B13

GND

B14

PAD

5

PAD

6

CN5

317JD24BZTF3K3C3

VBUS2

PORT2_CC1
PORT2_CC2

TYPE-C Sink port (Port2)

VBUS

1

D-

2

D+

3

GND

4

SHELL

5

SHELL

6

CN1

319AFKA06CN

321

JP3

VCONN_OUT

C2_RX1+
C2_RX1-

C2_TX1+
C2_TX1-

C2_RX2+

C2_RX2-

C2_TX2+

C2_TX2-

C2_RX1+
C2_RX1-

C2_TX1+
C2_TX1-

2_SBU2

C2_RX2+

C2_RX2-

C2_TX2+

C2_TX2-

+5V

C_SBU2

2

C_CC1

4

C_SBU1

1

VBIAS

3

RPD_G2

6

RPD_G1

7

GND

8

/FLT

9

VPWR

10

CC2

11

C_CC2

5

CC1

12

GND

13

SBU2

14

SBU1

15

D4

16

D3

17

D2

19

D1

20

GND

18

PAD

21

U16

TPD8S300RUKR

C96 100nF

VDD

R112
100K

C47
1uF_X5R_0603

PORT2_CC2

PORT2_CC1

2_SBU1

2_SBU1
2_SBU2

1

3

2

4

5 6

7

8

9

10

U5

HSP051-4M10

C2_RX2-

C2_RX2+

C2_TX2-

C2_TX2+

1

3

2

4

5 6

7

8

9

10

U11

HSP051-4M10

C2_RX1+

C2_RX1-

C2_TX1+

C2_TX1-

Differential pairs 90ohm

Differential pairs 90ohm

Differential pairs 90ohm

C2_CC1
C2_CC2

C2_SBU1
C2_SBU2

D1

ESDA25P35-1U1M

VBUS2

C2_CC1
C2_CC2
C2_SBU1
C2_SBU2

PORT2_CC2

PORT2_CC1

2_SBU1
2_SBU2

CON2_D­CON2_D+

SB64
SB65

SB66
SB67

SB17
SB16

SB50
SB49

SB52
SB51

SB44
SB45
SB41
SB42

C2_D­C2_D+

SB68
SB69

C2_D­C2_D+

C15
1uF[N/A]

VBUS2

13245

6

D2

ESDA25SC6[N/A]

C110

390pF[N/A]

C111

390pF[N/A]

Figure 49. STM32G081B-EVAL UCPD daughterboard Type-C sink con

Electrical schematics UM2403

Figure 50. STM32G081B-EVAL UCPD daughterboard USB PD

810

USB_PD

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL USB-C daughter board

MB1352C02

3-Aug-18

Variant name is not interpreted until output

Date:

-

Variant:

VBUS1

R41
2K

4

3

5

G

S

D

678

2

1

T6
STL9P3LLH6

4

3

5

G

S

D

678

2

1

T7

STL9P3LLH6

R42
21K

3

1

4

G

SD

256

7

8

T5
STL6N2VH5

VSOURCE

SOURCE_EN

R64
330K[1%]

VSENSE_1

3

1

4

G

SD

256

7

8

T8
STL6N2VH5

DISCHARGE_1

SB35

R47
1K/0.5W

3

2

1

5

4

U25
TSV911ILT

C72

100nF

C63

100nF

ISENSE_1

C68

100nF

Power Delivery management (TypeC Port1)

VBUS2

R63
330K[1%]

VSENSE_2

3

2

1

5

4

U26
TSV911ILT

C73

100nF

C64

100nF

ISENSE_2

C69

100nF

3

1

4

G

SD

256

7

8

T9
STL6N2VH5

DISCHARGE_2

SB36

R57

49.9K

R58

49.9K

R119

49.9K[1%]

R118

49.9K[1%]

R78

49.9K[1%]

R80

49.9K[1%]

R77

49.9K[1%]

R79

49.9K[1%]

Power Delivery management (TypeC Port2)

+3V3

+3V3

R69

0.005[1%]

R70

0.005[1%]

+3V3

+3V3

3A

3A

3

2

1

5

4

U28
TSV911ILT

+3V3

C99

100nF

3

2

1

5

4

U27
TSV911ILT

+3V3

C98

100nF

R116 43K

R115 43K

R122 24.9K

R121 24.9K

R124
10K

R49
1K/0.5W

R52
1K/0.5W

R56
1K/0.5W

R48
1K/0.5W

R50
1K/0.5W

R55
1K/0.5W

R59
1K/0.5W

LOCAL_PWR1

LOCAL_PWR2

C4
220nF[N/A]

C3

22nF

C18

22nF

TP9
LOCAL_PWR1

TP10
VBUS2

1
2

CN11

MPT 0.5/2-2.54

1
2

CN12

MPT 0.5/2-2.54

GND

2

IN-

5

IN+

4

REF

1

VCC

3

OUT

6

U23
INA199C1DCKR

GND

2

IN-

5

IN+

4

REF

1

VCC

3

OUT

6

U24
INA199C1DCKR

UM2403 Electrical schematics

UM2403 Rev 1 69/78

70/78 UM2403 Rev 1

910

POWER

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL USB-C daughter board

MB1352C02

3-Aug-18

Variant name is not interpreted until output

Date:

-

Variant:

Power jack input

D5V power

SV

1

SG

2

CV

3

CG1

4

CG2

5

CG3

6

L1

BNX002-01

C2
220uF/50V

Z1
SMAJ20A-TR

C1
100nF/50V

TP3
Ground

TP8
Ground

R73
21K

VDC

4

3

5

G

S

D

678

2

1

T10

STL9P3LLH6

D8

STPS2L30A

R72

21K

Local power selection

3

2

1

JP5

PSU

PSU

TP2
PSU

C70
33uF(TPS83360160500)

SB37

C62

39nF/50V

R66

22K

C61

2.2nF/50V

C60

7.5nF/50V

R67
100

C66

3.3uF/50V

C67

220nF/50V[N/A]

R71
162K

D9
STPS3L40S

R68

4.99K

VDC D5V

SYNCH

2

FB

5

COMP

4

OUT

1

EN

3

FSW

6

GND

7

VCC

8

GND

9

U22

L7985A

R65
680

TP7
D5V

1A

1A

1A

3A

L5

47uH(MSS1246T-473MLB)

2

3

4

5

1

CN3

DC-094

12

LD1
Green

R125
3K

LOCAL_PWR1

LOCAL_PWR2

Z2
SMAJ5.0A-TR

D3 STPS2L30A[N/A]

12

LD2
Green

R10
1K

D3: Backup footprint

Figure 51. STM32G081B-EVAL UCPD daughterboard power

Electrical schematics UM2403

10 10

SOURCE POWER

Title:

Size:

Reference:
Sheet: ofA4

Revision:

Project:

STM32G081B-EVAL USB-C daughter board

MB1352C02

3-Aug-18

Variant name is not interpreted until output

Date:

-

Variant:

PSU

L2

4.7uH(SRN8040-4R7Y)

C49
750pF/50V

R40

51.1K
C50

11pF/50V

R60
[N/A]

R62

93.1K[1%]

R45
220K[1%]

R43

12.4K[1%]

R44

9.1K[1%]

R46

20.5K[1%]

3A

3A

VIN

2

FB

5

RT/CLK

4

BOOT

1

EN

3

COMP

6

GND

7

SW

8

GND

9

U18

TPS54540

C56 100nF

D4
B540C-13-F

Source Power

vPWM mode: 0 and open-drain, 20kHz

VSOURCE

R61

7.5K[1%]

C57

470nF/50V

R54

5.1K[1%]

R53
82K[1%]

PWM voltage control

R51
[N/A]

VDD

V_CTL2

V_CTL1

VSOURCE_9V

PWM_CTL

VSOURCE_15V PWM_CTL

VSOURCE_9V

R6
3K[1%]

R3

200K[1%]

DCDC_EN

VSOURCE_15V

DCDC_EN

R7 0

R83
330K[1%]

VSENSE_DCDC

R84

49.9K[1%]

3

2

1

5

4

U29
TSV911ILT

+3V3

C41

100nF

R101 43K

C48

10nF

DCDC_EN

C1062.2uF[GRM188R61E225MA12]

C1072.2uF[GRM188R61E225MA12]

C592.2uF[GRM188R61E225MA12]

C10522uF[GRM21BR6E226ME44]

R110 0

R111
[N/A]

C108
[N/A]

C5356uF/25V[25SVPF56M]

C5222uF[GRM21BR6E226ME44]

C1031uF[GRM155R61E105MA12]

C1044.7nF[GRM155R71E472KA01]

SB14

SB2

SB15

SB23

SB13

SB3

C109

68pF/50V

R127
0

GPIO mode
Fixed voltage output:5V/9V/15V

VSENSE_DCDC:
Detect U18 output voltage level

Mode

GPIO

PWM(Default)

Mount Removed

SB13,SB14,SB15 SB2,SB3,SB23,SB26

SB13,SB14,SB15

Step2: PWM_CTL provides about 0.8V level before DCDC_EN=1

Step1: DCDC_EN detects its voltage to ensure PSU 19V exist

Step3: DCDC_EN=1, then PWM_CTL changes to provide PWM

waveform by 0 and open-drain

SB2,SB3,SB23,SB26

SB26

Figure 52. STM32G081B-EVAL UCPD daughterboard source power

UM2403 Electrical schematics

UM2403 Rev 1 71/78

STM32G081B-EVAL IO Assignment UM2403

Appendix B STM32G081B-EVAL IO Assignment

Pin Name

Pin No.

1 PC11 VCP_USART_3_RX - -

2 PC12 GPIO_LCD / SD_MOSI_DIR - -

3PC13

PC14 -

4

OSC32_IN

PC15 -

5

OSC32_OUT

6 PF3 - VBAT VBAT - -

7 PF4 - VREF+ VREF+ - -

8 VDD_1 VDD - -

9 VSS_1 VSS - -

Table 40. STM32G081B-EVAL IO Assignment

IO Assignment on mother

board

KEY_TAMP_IN1, RTC_TS,
RTC_OUT1, WKUP2

OSC32_IN - -

OSC32_OUT - -

IO Assignment on

legacy daughterboard

--

IO Assignment on UCPD

daughterboard

10 PF0 - OSC_IN OSC_IN - -

11 PF1 - OSC_OUT OSC_OUT - -

12 PF2 - NRST NRST, (WKUP8) - -

13 PC0 GPIO_EXT_RST - -

14 PC1 MC_IO_(PFC_sync1) -

15 PC2 GPIO_JOY_UP - -

16 PC3 GPIO_JOY_DOWN - -

17 PA0

18 PA1

19 PA2 MC_ADC_IN2(CurrentA) SMART_2_TX TYPE-C_1_FRSTX

20 PA3

21 PA4 AUDIO_OUT_DAC1_OUT1 - -

22 PA5 AUDIO_OUT_DAC1_OUT2 - -

23 PA6

JOY_SEL_TAMP_IN2,
WKUP1

MC_AIN1_COMP_1_INP
(Bus voltage)

MC_ADC_IN3(Heatsink
temp)

AUDIO_IN_ADC_IN6 /
MC_ADC_IN6(CurrentB)

--

LDR_OUT_COMP_1_INP
_ADC_IN1

GPIO_SMART_1V8 TYPE-C_2_V_ADC_IN3

--

GPIO_9V_EN_LPTIM1_OU
T

GPIO_DP1_DET

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UM2403 STM32G081B-EVAL IO Assignment

Table 40. STM32G081B-EVAL IO Assignment (continued)

Pin No.

Pin Name

IO Assignment on mother

board

IO Assignment on

legacy daughterboard

IO Assignment on UCPD

daughterboard

24 PA7 LCD/SD1_MOSI - -

25 PC4 USART_1_TX - -

26 PC5 USART_1_RX - -

27 PB0

MC_TIM_3_CH3(Encoder
index)

GPIO_SMART_CMDVCC TYPE-C_1_FRSTX

28 PB1 MC_TIM_3_CH4(PFC_PWM) - TYPE-C_1_V_ADC_IN9

29 PB2 POT_ADC_IN10 - -

30 PB10 MC_ADC_IN11(CurrentC) HDMI_CEC TYPE-C_1_I_ADC_IN11

31 PB11 BOARD_DET_ADC_IN15 BOARD_DET_ADC_IN15 BOARD_DET_ADC_IN15

32 PB12

MC_TIM_1_BK(EmergencyS
TOP)

GPIO_SMART_OFF TYPE-C_2_I_ADC_IN16

33 PB13 - I2C2_SCL (HDMI_SINK) GPIO_DISCHARGE_1

34 PB14 - I2C2_SDA (HDMI_SINK) GPIO_DISCHARGE_2

35 PB15 MC_IO_ (Dissipative brake) GPIO_SMART_3/5V TYPE-C_1_CC2

36 PA8 MC_TIM_1_CH1(UH) - TYPE-C_1_CC1

37 PA9

USART_BOOT_1_TX /
MC_TIM_1_CH2(VH)

- TYPE-C_1_DBCC1

38 PC6 MC_TIM_3_CH1 (EncoderA) IR_IN_TIM3_CH1 GPIO_DP2_HPD

39 PC7 GPIO_JOY_RIGHT - -

40 PD8 LED3 - -

41 PD9 LED4 - -

42 PA10

USART_BOOT_1_RX /
MC_TIM_1_CH3(WH)

- TYPE-C_1_DBCC2

43 PA11 [PA9] USART_1_CTS - -

44 PA12 [PA10] USART_1_RTS_DE_CK - -

45 PA13 SWDIO - -

46 PA14 - BOOT0 SWCLK / BOOT0 - -

47 PA15 - GPIO_SMART_RST GPIO_USB3_DET

48 PC8 GPIO_JOY_LEFT - -

49 PC9 GPIO_SD_DETECT - -

50 PD0

MC_TIM_16_CH1(PFC_sync

2)

- TYPE-C_2_CC1

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77

STM32G081B-EVAL IO Assignment UM2403

Table 40. STM32G081B-EVAL IO Assignment (continued)

Pin Name

Pin No.

51 PD1 GPIO_SD_CS - -

52 PD2 MC_TIM_1_CH1N(UL) GPIO_HDMI_HPD_SINK TYPE-C_2_CC2

53 PD3 MC_TIM_1_CH2N(VL)

54 PD4 MC_TIM_1_CH3N(WL) SMART_2_RTS_DE_CK GPIO_VCONN_EN_1_1

55 PD5 LED1 - -

56 PD6 LED2 - -

57 PB3 LCD/SD1_SCK - -

58 PB4 LCD/SD1_MISO - -

59 PB5 MC_TIM_3_CH2(EncoderB)

60 PB6 I2C1_SCL

61 PB7 I2C1_SDA

62 PB8 GPIO_LCD_CS - -

IO Assignment on mother

board

IO Assignment on

legacy daughterboard

GPIO_HDMI_HPD_SOUR
CE

TEMP_SENSOR_INT_W
KUP6

HDMI_SOURCE_I2C1_S
CL

HDMI_SOURCE_I2C1_S
DA

IO Assignment on UCPD

daughterboard

GPIO_SOURCE_EN

GPIO_15V_EN

MUX_I2C1_SCL

MUX_I2C1_SDA

63 PB9 MC_IO_ (NTC_bypass) IR_OUT GPIO_VCONN_EN_1_2

64 PC10 VCP_USART_3_TX - -

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UM2403Federal Communications Commission (FCC) and Industry Canada (IC) Compliance State-

Appendix C Federal Communications Commission (FCC)

and
Industry Canada (IC) Compliance Statements

C.1 FCC Compliance Statement

C.1.1 Part 15.19

This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired
operation.

C.1.2 Part 15.105

This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense.

C.1.3 Part 15.21

Any changes or modifications to this equipment not expressly approved by
STMicroelectronics may cause harmful interference and void the user's authority to operate
this equipment.

C.2 IC Compliance Statement

C.2.1 Compliance Statement

Industry Canada ICES-003 Compliance Label: CAN ICES-3 (A)/NMB-3(A).

C.3 Déclaration de conformité

Étiquette de conformité à la NMB-003 d'Industrie Canada: CAN ICES-3 (A)/NMB-3(A).

UM2403 Rev 1 75/78

77

Mechanical dimensions UM2403

Appendix D Mechanical dimensions

Figure 53. Mechanical dimensions

Symbol Size (mm) Symbol Size (mm) Symbol Size (mm)

A 68.58 e 77.44 P2 111.76

A1 61.97 H 11 P3 10.41

a 2.54 Lx 5.715 Q1 24.12

B 36 Ly 5.715 Q2 17.70

D 3.5 Mx 19.08 Q3 16

d 3.2 My 23.81 X 114.3

E 47 P1 65.78 Y 172.72

76/78 UM2403 Rev 1

Table 41. Mechanical dimensions

UM2403 Revision history

Revision history

Table 42. Document revision history

Date Revision Changes

7-Nov-2018 1 Initial version

UM2403 Rev 1 77/78

77

UM2403

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