Pin
de
sc
rip
tions
STM3
2L1
5
1x
C/C-
A
STM3
2L1
52x
C/C-
A
4
6/1
Do
cID0
261
1
9 Rev 5
Alternate functions
Table 9. Alternate function input/output
Port name
Digital alternate function number
AFIO0
AFIO1
AFIO2
AFIO3
AFIO4
AFIO5
AFIO6
AFIO7
AFIO8 .. AFIO11 AFIO12 ..
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