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Alternate functions
Table 10. Alternate function input/output
Port
name
Digital alternate function number
AFIO0
AFIO1
AFIO2
AFIO3
AFIO4
AFIO5
AFIO6
AFIO7
.
.
AFIO11
.
.
AFIO14
AFIO15
Alternate function
SYSTEM
TIM2
TIM3/4/5
TIM9/
10/11
I2C1/2
SPI1/2
SPI3
USART1/2/3
LCD
CPRI
SYSTEM
BOOT0
BOOT0 -
-
-
-
-
-
-
-
-
EVENT
OUT
NRST
NRST -
-
-
-
-
-
-
-
-
-
PA0-
WKUP1
-
TIM2_CH1_ ETR TIM5_CH1
-
-
-
-
USART2_CTS
-
TIMx_IC1
EVENT OUT
PA1
-
TIM2_CH2 TIM5_CH2 -
-
-
-
USART2_RTS
SEG0 TIMx_IC2
EVENT
OUT
PA2
-
TIM2_CH3 TIM5_CH3
TIM9_CH1 -
-
-
USART2_TX SEG1 TIMx_IC3
EVENT
OUT
PA3
-
TIM2_CH4 TIM5_CH4
TIM9_CH2 -
-
-
USART2_RX SEG2 TIMx_IC4
EVENT
OUT
PA4
-
-
-
-
-
SPI1_NSS
SPI3_NSS
I2S3_WS
USART2_CK -
TIMx_IC1
EVENT
OUT
PA5
-
TIM2_CH1_ETR
-
-
-
SPI1_SCK -
-
-
TIMx_IC2
EVENT
OUT
PA6
-
-
TIM3_CH1 TIM10_
CH1
-
SPI1_MISO
-
-
SEG3
TIMx_IC3
EVENT
OUT
PA7
-
-
TIM3_CH2 TIM11_
CH1
-
SPI1_MOSI
-
-
SEG4
TIMx_IC4
EVENT
OUT
PA8
MCO -
-
-
-
-
-
USART1_CK
COM0
TIMx_IC1
EVENT
OUT
PA9
-
-
-
-
-
-
-
USART1_TX COM1 TIMx_IC2
EVENT
OUT
PA10
-
-
-
-
-
-
-
USART1_RX COM2 TIMx_IC3
EVENT
OUT
PA11
-
-
-
-
-
SPI1_MISO -
USART1_CTS
-
TIMx_IC4
EVENT
OUT
PA12
-
-
-
-
-
SPI1_MOSI -
USART1_RTS
-
TIMx_IC1
EVENT
OUT
PA13
JTMS-SWDIO -
-
-
-
-
-
-
-
TIMx_IC2
EVENT
OUT
PA14
JTCK-SWCLK -
-
-
-
-
-
-
-
TIMx_IC3
EVEN
TOUT
PA15
JTDI TIM2_CH1_ETR
-
-
-
SPI1_NSS
SPI3_NSS
I2S3_WS
-
SEG17 TIMx_IC4
EVEN
TOUT