Datasheet

Pinouts and pin description STM32L431xx
62/200 DocID028800 Rev 1
--- - - - -88A5 PD7 I/O FT -
USART2_CK,
QUADSPI_BK2_IO3,
EVENTOUT
-
26 39 39 A3 A5 55 A5 89 A8
PB3
(JTDO-
TRACE
SWO)
I/O FT_a
(3)
JTDO-TRACESWO,
TIM2_CH2, SPI1_SCK,
SPI3_SCK,
USART1_RTS_DE,
SAI1_SCK_B,
EVENTOUT
COMP2_INM
27 40 40 A4 B4 56 A4 90 A7
PB4
(NJTRST)
I/O FT_fa
(3)
NJTRST, I2C3_SDA,
SPI1_MISO, SPI3_MISO,
USART1_CTS,
TSC_G2_IO1,
SAI1_MCLK_B,
EVENTOUT
COMP2_INP
28 41 41 B4 C4 57 C4 91 C5 PB5 I/O FT -
LPTIM1_IN1,
I2C1_SMBA,
SPI1_MOSI, SPI3_MOSI,
USART1_CK,
TSC_G2_IO2,
COMP2_OUT,
SAI1_SD_B,
TIM16_BKIN,
EVENTOUT
-
29 42 42 C4 B5 58 D3 92 B5 PB6 I/O FT_fa -
LPTIM1_ETR, I2C1_SCL,
USART1_TX,
TSC_G2_IO3,
SAI1_FS_B,
TIM16_CH1N,
EVENTOUT
COMP2_INP
30 43 43 D4 A6 59 C3 93 B4 PB7 I/O FT_fa -
LPTIM1_IN2, I2C1_SDA,
USART1_RX,
TSC_G2_IO4,
EVENTOUT
COMP2_INM,
PVD_IN
31 44 44 A5 C5 60 B4 94 A4
PH3/
BOOT0
I/O FT - EVENTOUT BOOT0
- 45 45 B5 C6 61 B3 95 A3 PB8 I/O FT_f -
I2C1_SCL, CAN1_RX,
SDMMC1_D4,
SAI1_MCLK_A,
TIM16_CH1, EVENTOUT
-
- 46 46 C5 B6 62 A3 96 B3 PB9 I/O FT_f -
IR_OUT, I2C1_SDA,
SPI2_NSS, CAN1_TX,
SDMMC1_D5,
SAI1_FS_A, EVENTOUT
-
Table 14. STM32L431xx pin definitions (continued)
Pin Number
Pin name
(function
after
reset)
Pin type I/O structure Notes
Pin functions
UFQFPN32 LQFP48 UFQFPN48 WLCSP49 WLCSP64 LQFP64 UFBGA64 LQFP100 UFBGA100
Alternate functions
Additional
functions
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