Table 18. Zio Connector (Cn7) Pinout; Table 19. Zio Connector (Cn8) Pinout - STMicroelectronics STM32H7 User Manual

NUCLEO-H723ZG, NUCLEO-H743ZI2, and NUCLEO-H753ZI pin assignments
Pin
Pin Signal name
name
1 D16 I2S_A_MCK
3 D17 I2S_A_SD
5 D18 I2S_A_CK
7 D19 I2S_A_WS
9 D20 I2S_B_WS
11 D21 I2S_B_MCK
I2S_B_SD/
13 D22
SPI_B_MOSI
I2S_B_CK/
15 D23
SPI_B_SCK
17 D24 SPI_B_NSS
19 D25 SPI_B_MISO
1. For more details, refer to Table 14: Solder bridge and jumper
2. PB13 is used as I2S_A_CK and connected to CN7 pin 5. If JP6 is ON, it is also connected to Ethernet PHY as RMII_TXD1. In this case, only one function of the Ethernet or
I2S_A must be used.
3. PA7 is used as D11 and connected to CN7 pin 14. If SB31 is ON, it is also connected to Ethernet PHY as RMII_CRS_DV. In this case, only one function of the Ethernet or
D11 must be used.
Pin Pin name Signal name
1 NC NC
3 IOREF IOREF
5 NRST NRST

Table 18. ZIO connector (CN7) pinout

STM32H7
MCU function Pin
pin
PC6 I2S_2 2
PB15 I2S_2 4
(2)
PB13 I2S_2 6
PB12 I2S_2 8
PA15 I2S_3 10
PC7 I2S_3 12
I2S_3/
PB5 14
SPI3
I2S_3/
PB3 16
SPI3
PA4 SPI3 18
PB4 SPI3 20
configuration.

Table 19. ZIO connector (CN8) pinout

STM32H7
MCU function
pin
- -
- 3.3 V reference
NRST RESET
(1)
Pin name Signal name
D15 I2C_A_SCL
D14 I2C_A_SDA
VREFP VREFP
GND GND
D13 SPI_A_SCK
D12 SPI_A_MISO
SPI_A_MOSI /
D11
TIM_E_PWM1
SPI_A_CS /
D10
TIM_B_PWM3
D9 TIM_B_PWM2
D8 I/O
Pin Pin name Signal name
2 D43 SDMMC_D0
SDMMC_D1
4 D44
I2S_A_CKIN
6 D45 SDMMC_D2
STM32H7 pin MCU function
PB8 I2C_1_SCL
PB9 I2C_1_SDA
- VDDA/VREFP
- -
PA5 SPI1_SCK
PA6 SPI1_MISO
SPI1_MOSI/
(3)
PB5
TIM3_CH2
SPI1_CS/
PD14
TIM4_CH3
PD15 TIM4_CH4
PF3 -
STM32H7
MCU function
pin
PC8 SDMMC
SDMMC
PC9
I2S_CKIN
PC10 SDMMC