Datasheet

STM32F051x Pinouts and pin description
Doc ID 018746 Rev 2 27/30
27 19 15 PB1 I/O TTa
TIM3_CH4, TIM14_CH1,
TIM1_CH3N, TSC_G3_IO3
ADC_IN9
28 20 16 PB2 I/O FT TSC_G3_IO4
29 21 PB10 I/O FT
I2C2_SCL, CEC, TIM2_CH3,
TSC_SYNC
30 22 PB11 I/O FT
I2C2_SDA, TIM2_CH4,
TSC_G6_IO1, EVENTOUT
31 23 0 VSS S Digital ground
32 24 17 VDD S Digital power supply
33 25 PB12 I/O FT
SPI2_NSS, TIM1_BKIN,
TSC_G6_IO2, EVENTOUT
34 26 PB13 I/O FT
SPI2_SCK, TIM1_CH1N,
TSC_G6_IO3
35 27 PB14 I/O FT
SPI2_MISO, TIM1_CH2N,
TIM15_CH1, TSC_G6_IO4
36 28 PB15 I/O FT
SPI2_MOSI, TIM1_CH3N,
TIM15_CH1N, TIM15_CH2
RTC_REFIN
37 PC6 I/O FT TIM3_CH1
38 PC7 I/O FT TIM3_CH2
39 PC8 I/O FT TIM3_CH3
40 PC9 I/O FT TIM3_CH4
41 29 18 PA8 I/O FT
USART1_CK, TIM1_CH1,
EVENTOUT, MCO
42 30 19 PA9 I/O FT
USART1_TX, TIM1_CH2,
TIM15_BKIN, TSC_G4_IO1
43 31 20 PA10 I/O FT
USART1_RX, TIM1_CH3,
TIM17_BKIN, TSC_G4_IO2
44 32 21 PA11 I/O FT
USART1_CTS, TIM1_CH4,
COMP1_OUT, TSC_G4_IO3,
EVENTOUT
45 33 22 PA12 I/O FT
USART1_RTS, TIM1_ETR,
COMP2_OUT, TSC_G4_IO4,
EVENTOUT
46 34 23
PA 13
(SWDAT)
I/O FT
(3)
IR_OUT, SWDAT
47 35 PF6 I/O FT I2C2_SCL
48 36 PF7 I/O FT I2C2_SDA
Table 11. Pin definitions (continued)
Pin number
Pin name
(function after
reset)
Pin type
I/O structure
Notes
Pin functions
LQFP64 LQFP48
UFQFPN32
Alternate functions Additional functions