STM32G0 datasheet(47/135 Pages) STMICROELECTRONICS

47 / 135 page

DS12232 Rev 4

47/135

STM32G071x8/xB

Pinouts, pin description and alternate functions

A3 25

44 D4 59

PB5

I/O

SPI1_MOSI/I2S1_SD,

TIM3_CH2, TIM16_BKIN,

LPTIM1_IN1, I2C1_SMBA,

COMP2_OUT

WKUP6

B3 26 26 30 30 45 A4 60

PB6

I/O

FT_fa

USART1_TX, TIM1_CH3,

TIM16_CH1N, SPI2_MISO,

LPTIM1_ETR, I2C1_SCL,

EVENTOUT

COMP2_INP

A4 27 27 31 31 46 A3 61

PB7

I/O

FT_fa

USART1_RX, SPI2_MOSI,

TIM17_CH1N,

USART4_CTS,

LPTIM1_IN2, I2C1_SDA,

EVENTOUT

COMP2_INM, PVD_IN

B4 28 28 32 32 47 B3 62

PB8

I/O

FT_f

CEC, SPI2_SCK,

TIM16_CH1, USART3_TX,

TIM15_BKIN, I2C1_SCL,

EVENTOUT

48C363

PB9

I/O

FT_f

IR_OUT, UCPD2_FRSTX,

TIM17_CH1, USART3_RX,

SPI2_NSS, I2C1_SDA,

EVENTOUT

A2 64

PC10

I/O

USART3_TX, USART4_TX,

TIM1_CH3

1. 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 example to drive a LED).

2. After an RTC domain power-up, PC13, PC14 and PC15 operate as GPIOs. Their function then depends on the content of

the RTC registers. The RTC registers are not reset upon system reset. For details on how to manage these GPIOs, refer to

the RTC domain and RTC register descriptions in the RM0444 reference manual.

3. Upon reset, a pull-down resistor might be present on PB15, PA8, PD0, or PD2, depending on the voltage level on PB0,

PA9, PC6, PA10, PD1, and PD3. In order to disable this resistor, strobe the UCPDx_STROBE bit of the SYSCFG_CFGR1

4. Pins PA9/PA10 can be remapped in place of pins PA11/PA12 (default mapping), using SYSCFG_CFGR1 register.

5. Upon reset, these pins are configured as SW debug alternate functions, and the internal pull-up on PA13 pin and the

internal pull-down on PA14 pin are activated.

Table 12. Pin assignment and description (continued)

Pin number

Pin name

(function

upon reset)

Alternate

functions

Additional

functions

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