Table 44. Mb1262/Cn21 Connector Pinout; Table 45. Hw Configurations To Enable Sai2 On The Gpio Connector - ST STM32MP157 Series User Manual

Please note the pin1 position that is on the bottom right on MB1262/CN21.
Table 44 describes the MB1262/CN21 connector pinout.
STM32 pin
PA12
PA11
PI11
PG8
PD7
PG15
PZ2
PZ1
PZ0
PH5
PG2
PA3
PI2
PI7
PF5
SAI2 on the GPIO connector supports PCM signals. SAI2 is shared between the audio codec and this GPIO
expansion connector. By default, SAI2 is connected to the audio codec. I2C5 is connected by default to the
I2C_EXT connector.
The following HW board modifications are needed to enable SAI2 and I2C5 on the GPIO expansion connector, as
described in Table
STM32
pin
PI5 SAI2_SCKA
PI7 SAI2_FSA
PI6 SAI2_SDA
PF11 SAI2_SDB
PA12 I2C5_SDA
PA11 I2C5_SCL
UM2535 - Rev 1
Table 44.
Board function
3V3
I2C5_SDA
I2C5_SCL
MCO1
GND
USART3_RTS
SDMMC3_D3
SDMMC3_CK
3V3
SPI1_MOSI
SPI1_MISO
SPI1_SCK
GND
I2C2_SDA
MCO2
TIM2_CH4
TIM8_CH4
SAI2_FSA
SDMMC3_D2
GND
45.
Table 45. HW configurations to enable SAI2 on the GPIO connector
Board function
Open MB1262/SB9 and SB67. Close MB1262/SB66
Open MB1262/SB11 and SB65. Close MB1262/SB63
Open MB1262/SB10 and SB75. Close MB1262/SB73
Open MB1262/SB8 and SB70. Close MB1262/SB69
Open MB1262/SB54. Close MB1262/SB55
Open MB1262/SB51. Close MB1262/SB52
MB1262/CN21 connector pinout
Pin Pin
1 2 5V
3 4 5V
5 6 GND
7 8 USART3_TX
9 10 USART3_RX
11 12 SAI2_SCKA
13 14 GND
15 16 SDMMC3_CMD
17 18 SDMMC3_D0
19 20 GND
21 22 SDMMC3_D1
23 24 SPI1_NSS
25 26 GPIO
27 28 I2C2_SCL
29 30 GND
31 32 TIM12_CH1
33 34 GND
35 36 USART3_CTS
37 38 SAI2_SDA
39 40 SAI2_SDB
Board modifications to enable SAI2 on the GPIO connector
GPIO 40-pin expansion connector
Board function STM32 pin
PB10
PB12
PI5
GND
PF1
PF0
GND
PF4
PZ3
PH4
PH6
PI10
PI6
PF11
UM2535
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