STM32F070CB datasheet(29/83 Pages) STMICROELECTRONICS

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STM32F070CB/RB/C6/F6

Pinouts and pin descriptions

PB7

I/O

FTf

(4)

I2C1_SDA, USART1_RX,

USART4_CTS,

TIM17_CH1N

BOOT0

Boot memory selection

PB8

I/O

FTf

I2C1_SCL, TIM16_CH1

PB9

I/O

FTf

(4)

SPI2_NSS, I2C1_SDA,

IR_OUT,

TIM17_CH1, EVENTOUT

VSS

Ground

VDD

Digital power supply

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 (e.g. to drive an LED).

2. After the first RTC 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 RTC domain and RTC register descriptions in the reference manual.

3. Available on STM32F070C6/F6 devices only.

4. TIM15, I2C2, WKUP4, WKUP5, WKUP6, WKUP7, SPI2, USART3 and USART4 are available on STM32F070CB/RB

devices only.

5. On STM32F070C6/F6 devices, pin pair PA11/12 can be remapped instead of pin pair PA9/10 using SYSCFG_CFGR1

6. After reset, these pins are configured as SWDIO and SWCLK alternate functions, and the internal pull-up on the SWDIO

pin and the internal pull-down on the SWCLK pin are activated.

Table 10. STM32F070xB/6 pin definitions (continued)

Pin numbers

Pin name

(function after

reset)

type

Pin functions

Alternate functions

Additional functions

STM32F070CB 数据表(PDF) 29 Page - STMicroelectronics

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