STM32F031C4(2015) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32F031C4
(Rev.:2015)

ARM®-based 32-bit MCU with up to 32 Kbyte Flash, 9 timers, ADC and communication interfaces, 2.0 - 3.6 V

STMicroelectronics 

Pinouts and pin description

STM32F031x4 STM32F031x6

Pin number

Table 11. Pin definitions (continued)

Pin functions

Pin name

(function upon

reset)

Notes

Alternate functions

Additional

functions

SPI1_MOSI,

I2S1_SD,

41 28 28 26 C2 -

PB5

I/O FT -

I2C1_SMBA,

-

TIM16_BKIN,

TIM3_CH2

I2C1_SCL,

42 29 29 27 B2 -

PB6

I/O FTf -

USART1_TX,

-

TIM16_CH1N

I2C1_SDA,

43 30 30 28 A3 -

PB7

I/O FTf -

USART1_RX,

-

TIM17_CH1N

44 31 31 1 A4 1

BOOT0

IB

-

Boot memory selection

45 - 32 - - -

PB8

I/O FTf (4)

I2C1_SCL,

TIM16_CH1

-

I2C1_SDA,

46 - - - - -

PB9

I/O FTf -

IR_OUT,

TIM17_CH1,

-

EVENTOUT

47 32 0 - E1 -

VSS

S-

-

Ground

48 1 1 - - -

VDD

S-

-

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. VSSA pin is not in package pinout. VSSA pad of the die is connected to VSS pin.

4. On the LQFP32 package, PB2 and PB8 should be treated as unconnected pins (even when they are not available on the

package, they are not forced to a defined level by hardware).

5. 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.

6. On the WLCSP25 package, PB3, PB4 and PA15 must be set to defined levels by software, as their corresponding pads on

the silicon die are left unconnected. Apply same recommendations as for unconnected pins.

30/106

DocID025743 Rev 4

Share Link: