Table 13. Stm32F042X Pin Definitions - STMicroelectronics STM32F042G4 Manual

STM32F042xx
Pin numbers
1 - - -
2 A6 - -
3 B6 - -
4 C6 - -
5 B5 2 2
6 C5 3 3
7 D5 4 4
8 D6 32 0
9 E5 5 5
10 F6 6 6
11 D4 7 7
12 E4 8 8
13 F5 9 9

Table 13. STM32F042x pin definitions

Pin name
(function after
reset)
- - VBAT
- - PC13
PC14-
- - OSC32_IN
(PC14)
PC15-
- - OSC32_OUT
(PC15)
PF0-OSC_IN
2 2
(PF0)
PF1-OSC_OUT
3 3
(PF1)
4 4 NRST
16 15 VSSA
5 5 VDDA
6 6 PA0
7 7 PA1
8 8 PA2
9 9 PA3
DocID025832 Rev 2
Pin
type
Alternate function
S - -
(1)
I/O TC
(2)
(1)
I/O TC
(2)
(1)
I/O TC
(2)
I/O FTf -
I/O FTf -
Device reset input / internal reset output
I/O RST -
S -
S -
USART2_CTS,
I/O TTa - TIM2_CH1_ETR,
USART2_RTS,
I/O TTa -
TSC_G1_IO2,
I/O TTa -
I/O TTa -
Pinouts and pin descriptions
Pin functions
Additional
functions
Backup power supply
WKUP2,
RTC_TAMP1,
-
RTC_TS,
RTC_OUT
- OSC32_IN
- OSC32_OUT
CRS_ SYNC
OSC_IN
I2C1_SDA
I2C1_SCL OSC_OUT
(active low)
Analog ground
Analog power supply
WKUP1,
TSC_G1_IO1
ADC_IN0,
TIM2_CH2,
ADC_IN1
EVENTOUT
USART2_TX,
ADC_IN2,
TIM2_CH3,
TSC_G1_IO3
USART2_RX,
TIM2_CH4, ADC_IN3
TSC_G1_IO4
RTC_
TAMP2,
WKUP4
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