STM32F101X6 datasheet(22/74 Pages) STMICROELECTRONICS

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Pin descriptions

STM32F101xx

22/74

PD4

I/O

PD4

USART2_RTS

PD5

I/O

PD5

USART2_TX

PD6

I/O

PD6

USART2_RX

PD7

I/O

PD7

USART2_CK

PB3/JTDO

I/O

JTDO

PB3/TRACESWO

TIM2_CH2 /

SPI1_SCK

PB4/JNTRST

I/O

JNTRST

PB4

TIM3_CH1 /

SPI1_MISO

PB5

I/O

PB5

I2C1_SMBAl

TIM3_CH2 /

SPI1_MOSI

PB6

I/O

PB6

I2C1_SCL(8)/

TIM4_CH1(6) (8)

USART1_TX

PB7

I/O

PB7

I2C1_SDA(8)/

TIM4_CH2(6) (8)

USART1_RX

BOOT0

PB8

I/O

PB8

TIM4_CH3(6) (8)

I2C1_SCL

PB9

I/O

PB9

TIM4_CH4(6) (8)

I2C1_SDA

PE0

I/O

PE0

TIM4_ETR(6)

PE1

I/O

PE1

VSS_3

SVSS_3

100

VDD_3

SVDD_3

I = input, O = output, S = supply, HiZ= high impedance.

FT= 5 V tolerant.

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 SPI1, USART1 & USART2 and TIM2 & TIM 3, respectively. Refer to Table 2 on page 8.

PC13, PC14 and PC15 are supplied through the power switch, and so their use in output mode is limited: they can be used

only in output 2 MHz mode with a maximum load of 30 pF and only one pin can be put in output mode at a time.

Main function after the first backup domain power-up. Later on, it depends on the contents of the Backup registers even

after reset (because these registers are not reset by the main reset). For details on how to manage these IOs, refer to the

Battery backup domain and BKP register description sections in the STM32F10xxx reference manual, available from the

STMicroelectronics website: www.st.com.

Available only on devices with a Flash memory density equal or higher than 64 Kbytes.

The pins number 2 and 3 in the VFQFPN36 package, and 5 and 6 in the LQFP48 and LQFP64 packages are configured as

OSC_IN/OSC_OUT after reset, however the functionality of PD0 and PD1 can be remapped by software on these pins. For

the LQFP100 package, PD0 and PD1 are available by default, so there is no need for remapping. For more details, refer to

the Alternate function I/O and debug configuration section in the STM32F10xxx reference manual.

The use of PD0 and PD1 in output mode is limited as they can only be used at 50 MHz in output mode.

This alternate function can be remapped by software to some other port pins (if available on the used package). For more

details, refer to the Alternate function I/O and debug configuration section in the STM32F10xxx reference manual, available

from the STMicroelectronics website: www.st.com.

Table 3.

Pin definitions (continued)

Pins

Pin name

Main

function(3)

(after reset)

Alternate functions(3)

Default

Remap

STM32F101X6 数据表(PDF) 22 Page - STMicroelectronics

STM32F101X6 数据表(HTML) 22 Page - STMicroelectronics

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