
Pinouts and pin descriptions
STM32F051x4 STM32F051x6 STM32F051x8
Pin number
Table 13. Pin definitions (continued)
Pin functions
Pin name
(function upon
reset)
Alternate functions
Additional
functions
7 E1 7 D5 4 4
8 E3 - - - -
9 E2 - - - -
10 F2 - - - -
11 G1 - - - -
12 F1 8 D6 16 0
13 H1 9 E5 5 5
14 G2 10 F6 6 6
15 H2 11 D4 7 7
16 F3 12 E4 8 8
17 G3 13 F5 9 9
18 C2 - - - -
19 D2 - - - -
20 H3 14 C3 10 10
21 F4 15 D3 11 11
NRST
PC0
PC1
PC2
PC3
VSSA
VDDA
PA0
PA1
PA2
PA3
PF4
PF5
PA4
PA5
I/O RST -
I/O TTa -
I/O TTa -
I/O TTa -
I/O TTa -
S-
(3)
S-
-
I/O TTa -
I/O TTa -
I/O TTa -
I/O TTa -
I/O FT -
I/O FT -
I/O TTa -
I/O TTa -
Device reset input / internal reset output
(active low)
EVENTOUT
ADC_IN10
EVENTOUT
ADC_IN11
EVENTOUT
ADC_IN12
EVENTOUT
ADC_IN13
Analog ground
Analog power supply
USART2_CTS,
TIM2_CH1_ETR,
COMP1_OUT,
TSC_G1_IO1
ADC_IN0,
COMP1_INM6,
RTC_TAMP2,
WKUP1
USART2_RTS,
TIM2_CH2,
TSC_G1_IO2,
EVENTOUT
ADC_IN1,
COMP1_INP
USART2_TX,
TIM2_CH3,
TIM15_CH1,
COMP2_OUT,
TSC_G1_IO3
ADC_IN2,
COMP2_INM6
USART2_RX,
TIM2_CH4,
TIM15_CH2,
TSC_G1_IO4
ADC_IN3,
COMP2_INP
EVENTOUT
-
EVENTOUT
-
SPI1_NSS,
I2S1_WS,
USART2_CK,
TIM14_CH1,
TSC_G2_IO1
ADC_IN4,
COMP1_INM4,
COMP2_INM4,
DAC_OUT1
SPI1_SCK,
I2S1_CK, CEC,
TIM2_CH1_ETR,
TSC_G2_IO2
ADC_IN5,
COMP1_INM5,
COMP2_INM5
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