15 STM32U5A9NJH6Q GPIO and pin assignment
Note: Free MCU PIOs are easily accessible on tests points identified by their PIO name marking on board (PI4 not
accessible, OP1/OP2 for OPAMP1/2 VINM pins).
Note: In this table, “Exp. conn.” stands for Expansion connectors.
Table 34. STM32U5A9NJH6Q GPIO and pin assignment
STM32U5A9 pin
name
Signal assignment
Main function
(default)
Secondary
function
Pin number of
expansion connector or
test point reference
PA0 ADC12_IN5 Exp. conn. ADC - Pin 21 of CN9
PA1 OCTOSPIM_P1.DQS Octo-SPI - -
PA2 OCTOSPIM_P1.NCS Octo-SPI - -
PA3 TIM2_CH4 Exp. conn. TIMER - Pin 32 of CN10
PA4 ADC124_IN9 Exp. conn. ADC - Pin 25 of CN9
PA5 ADC124_IN10 Exp. conn. ADC - Pin 27 of CN9
PA6 USART3 _CTS Exp. conn. USART3 - Pin 30 of CN9
PA7 TIM3_CH2 Exp. conn. TIMER - Pin 18 of CN10
PA8 - - MCO output On SB59
PA9 T.VCP_TX (USART1_TX) STLINK-V3E
VCP BOOT
USART
-
PA10 T.VCP_RX (USART1_RX) STLINK-V3E
VCP BOOT
USART
-
PA11 USBC.HS_P USB Type-C - -
PA12 USBC.HS_N USB Type-C - -
PA13 T.SWDIO STLINK-V3E/SWD debug JTMS JTAG debug -
PA14 T.SWCLK STLINK-V3E/SWD debug JTCK JTAG debug -
PA15 T.JTDI -
JTDI JTAG debug/
UCPD.CC1
-
PB0 USART3 _SCLK Exp. conn. USART3 - Pin 22 of CN9
PB1 USART3 _RTS Exp. conn. USART3 - Pin 28 of CN9
PB2 ADC12_IN17 Exp. conn. ADC - Pin 19 of CN9
PB3 SDMMC2_D2 Exp. conn. SDMMC2
T.SWO or
JTDO JTAG debug
Pin 6 of CN9
PB4 SDMMC2_D3 Exp. conn. SDMMC2
JTNRST JTAG
debug
Pin 8 of CN9
PB5 TOF_INTN ToF sensor - -
PB6 I2C4_SCL I2C for Audio codec - -
PB7 I2C4_SDA I2C for Audio codec - -
PB8 SDMMC1.D4 eMMC - -
PB9 SDMMC1.D5 eMMC - -
PB10 USART3 _TX Exp. conn. USART3 DSI_V3 connector Pin 26 of CN9
PB11 USART3 _RX Exp. conn. USART3 - Pin 24 of CN9
PB12 SPI2 _NSS Exp. conn. SPI2 - Pin 17 of CN10
PB13 SPI2 _SCK Exp. conn. SPI2 DSI_V3 connector Pin 15 of CN10
UM2967
STM32U5A9NJH6Q GPIO and pin assignment
UM2967 - Rev 1
page 54/68
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