Table 9. Alternate Function Input/Output - STMicroelectronics STM32L151QCH6 Manual

Alternate functions
AFIO0 AFIO1
Port name
SYSTEM TIM2
BOOT0 BOOT0 -
NRST NRST -
PA0-WKUP1 - TIM2_CH1_ETR TIM5_CH1
PA1 - TIM2_CH2
PA2 - TIM2_CH3
PA3 - TIM2_CH4
PA4 - -
PA5 - TIM2_CH1_ETR
PA6 - -
PA7 - -
PA8 MCO -
PA9 - -
PA10 - -
PA11 - -

Table 9. Alternate function input/output

Digital alternate function number
AFIO2 AFIO3 AFIO4 AFIO5
TIM9/
TIM3/4/5 I2C1/2 SPI1/2
10/11
- - - -
- - - -
- - -
TIM5_CH2 - - -
TIM5_CH3 TIM9_CH1 - -
TIM5_CH4 TIM9_CH2 - -
- - - SPI1_NSS
- - - SPI1_SCK
TIM3_CH1 TIM10_ CH1 - SPI1_MISO
TIM3_CH2 TIM11_ CH1 - SPI1_MOSI
- - - -
- - - -
- - - -
- - - SPI1_MISO
AFIO6 AFIO7 AFIO8 .. AFIO11 AFIO12 ..
Alternate function
SPI3 USART1/2/3 -
- - -
- - -
- USART2_CTS -
- USART2_RTS -
- USART2_TX -
- USART2_RX -
SPI3_NSS
USART2_CK -
I2S3_WS
- - -
- - -
- - -
- USART1_CK -
- USART1_TX -
- USART1_RX -
USART1_CTS -
AFIO14
LCD - CPRI SYSTEM
EVENT
- - -
OUT
- - -
EVENT
- - TIMx_IC1
OUT
EVENT
SEG0 - TIMx_IC2
OUT
EVENT
SEG1 - TIMx_IC3
OUT
EVENT
SEG2 - TIMx_IC4
OUT
EVENT
- - TIMx_IC1
OUT
EVENT
- - TIMx_IC2
OUT
EVENT
SEG3 - TIMx_IC3
OUT
EVENT
SEG4 - TIMx_IC4
OUT
EVENT
COM0 - TIMx_IC1
OUT
EVENT
COM1 - TIMx_IC2
OUT
EVENT
COM2 - TIMx_IC3
OUT
EVENT
- - TIMx_IC4
OUT
AFIO15
-