STMicroelectronics STM32F042G4 Manual page 36

Pinouts and pin descriptions
Pin numbers
37 B2 24 24
38 A2 25 25
39 B3 26 26
40 A3 27 27
41 E6 28 28
42 C4 29 29
43 A4 30 30
44 - - 31
- B4 31 -
45 - - 32
36/117
Table 13. STM32F042x pin definitions (continued)
Pin name
(function after
reset)
22 20 PA14
23 - PA15
24 - PB3
25 - PB4
26 - PB5
27 - PB6
28 - PB7
PF11
- -
BOOT0
PB8
1 1
BOOT0
- - PB8
DocID025832 Rev 2
Pin
type
Alternate function
(3)
I/O FT USART2_TX, SWCLK
(5)
SPI1_NSS, I2S1_WS,
(3)
I/O FT TIM2_CH1_ETR,
SPI1_SCK, I2S1_CK,
I/O FT -
TSC_G5_IO1,
SPI1_MISO, I2S1_MCK,
I/O FT -
TSC_G5_IO2,
SPI1_MOSI, I2S1_SD,
I/O FT -
I/O FTf -
TIM16_CH1N,
I/O FTf - USART4_CTS,
TIM17_CH1N,
I/O FT -
I2C1_SCL, CEC,
I/O FTf -
I2C1_SCL, CEC,
I/O FTf -
STM32F042xx
Pin functions
Additional
functions
USART2_RX,
EVENTOUT,
USB_NOE
TIM2_CH2,
EVENTOUT
TIM17_BKIN,
TIM3_CH1,
EVENTOUT
I2C1_SMBA,
TIM16_BKIN,
TIM3_CH2
I2C1_SCL,
USART1_TX,
TSC_G5_I03
I2C1_SDA,
USART1_RX,
TSC_G5_IO4
Boot memory
-
selection
TIM16_CH1, Boot memory
TSC_SYNC, selection
CAN_RX
TIM16_CH1,
TSC_SYNC,
CAN_RX
-
-
-
-
WKUP6
-
-
-