STM32F101X4 datasheet(25/87 Pages) STMICROELECTRONICS

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STM32F101x4, STM32F101x6

Pinouts and pin description

49 28

PA14

I/O

JTCK/SWCL

-PA14

50 29

PA15

I/O

JTDI

TIM2_CH1_ETR/

PA15 / SPI_NSS

PC10

I/O

PC10

PC11

I/O

PC11

PC12

I/O

PC12

PD0

I/O

OSC_IN(8)

PD1

I/O

OSC_OUT(8)

PD2

I/O

PD2

TIM3_ETR

55 30

PB3

I/O

JTDO

TIM2_CH2 / PB3

TRACESWO

SPI_SCK

56 31

PB4

I/O

NJTRST

TIM3_CH1 / PB4

SPI_MISO

57 32

PB5

I/O

PB5

I2C_SMBA

TIM3_CH2 /

SPI_MOSI

58 33

PB6

I/O

PB6

I2C_SCL(7)

USART1_TX

59 34

PB7

I/O

PB7

I2C_SDA(7)

USART1_RX

60 35

BOOT0

PB8

I/O

PB8

I2C_SCL

PB9

I/O

PB9

I2C_SDA

63 36

VSS_3

S-

VSS_3

VDD_3

S-

VDD_3

1. I = input, O = output, S = supply.

2. FT= 5 V tolerant.

3. Function availability depends on the chosen device. For devices having reduced peripheral counts, it is always the lower

number of peripherals that is included. For example, if a device has only one SPI, two USARTs and two timers, they will be

called SPI, USART1 & USART2 and TIM2 & TIM 3, respectively. Refer to Table 2 on page 11.

4. If several peripherals share the same I/O pin, to avoid conflict between these alternate functions only one peripheral should

be enabled at a time through the peripheral clock enable bit (in the corresponding RCC peripheral clock enable register).

5. 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 and these IOs must not be used as a current source (e.g. to drive an LED).

Table 4. Low-density STM32F101xx pin definitions (continued)

Pins

Pin name

Main

function(3)

(after reset)

Alternate functions(3)(4)

Default

Remap

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