32G431 datasheet(60/198 Pages) STMICROELECTRONICS

60 / 198 page

Pinouts and pin description

STM32G431x6 STM32G431x8 STM32G431xB

60/198

DS12589 Rev 6

46 B6

PB9

I/O

FT_f

TIM17_CH1,

TIM4_CH4,

SAI1_D2, I2C1_SDA,

IR_OUT, USART3_TX,

COMP2_OUT,

FDCAN1_TX,

TIM8_CH3,

TIM1_CH3N,

SAI1_FS_A,

EVENTOUT

PE0

I/O

TIM4_ETR,

TIM16_CH1,

USART1_TX,

EVENTOUT

PE1

I/O

TIM17_CH1,

USART1_RX,

EVENTOUT

47 A6

VSS

48 A7

100

VDD

1. Function availability depends on the chosen device.

PC13, PC14 and PC15 are supplied through the power switch. Since the switch only sinks a limited amount of current (3

mA), the use of GPIOs PC13 to PC15 in output mode is limited:

- The speed should not exceed 2 MHz with a maximum load of 30 pF

- These GPIOs must not be used as current sources (for instance to drive an LED).

3. After a Backup domain power-up, PC13, PC14 and PC15 operate as GPIOs. Their function then depends on the content of

the RTC registers which are not reset by the system reset. For details on how to manage these GPIOs, refer to the Backup

domain and RTC register descriptions in the reference manual RM0440 "STM32G4 Series advanced Arm®-based 32-bit

MCUs".

4. PG10-NRST pin is FT tolerant if it is configured as PG10 GPIO by option bytes except for the startup time until option bytes

are loaded.

5. After reset, these pins are configured as JTAG/SW debug alternate functions, and the internal pull-up on PA15, PA13, PB4

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

6. After reset, a pull-down resistor (Rd = 5.1k

Ω from UCPD peripheral) can be activated on PB6, PB4 (UCPD1_CC1,

UCPD1_CC2). The pull-down on PB6 (UCPD1_CC1) is activated by high level on PA9 (UCPD1_DBCC1). The pull-down on

PB4 (UCPD1_CC2) is activated by high level on PA10 (UCPD1_DBCC2). This pull-down control (dead battery support on

UCPD peripheral) can be disabled by setting bit UCPD1_DBDIS=1 in the PWR_CR3 register. PB4, PB6 have UCPD_CC

functionality which implements an internal pull-down resistor (5.1k

Ω) which is controlled by the voltage on the

UCPD_DBCC pin (PA10, PA9). A high level on the UCPD_DBCC pin activates the pull-down on the UCPD_CC pin. The

pull-down effect on the CC lines can be removed by using the bit UCPD1_DBDIS =1 (USB Type-C and power delivery dead

battery disable) in the PWR_CR3 register.

7. It is recommended to set PB8 in another mode than analog mode after startup to limit consumption if the pin is left

unconnected.

Table 12. STM32G431x6/x8/xB pin definition(1) (continued)

Pin Number

Pin name

(function

after reset)

Alternate function

Additional

functions

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