Product Card

Table 18. SDCARD connector pinout MB1263/CN9
Pin Board function
1 DATA2_SD
2 DATA3_SD
3 CMD_SD
4 VDD_SD
5 CLK_SD
6 GND
7 DATA0_SD
8 DATA1_SD
9 GND
10 SDCARD_DETECT active LOW
6.15 Audio
A codec WM8994ECS/R connected to an SAI of STM32MP157xAA3 supports TDM feature of the SAI port. TDM
feature offers to STM32MP157xAA3 the capability to stream stereo audio channels. There are four digital
microphones on STM32MP157x-EV1 board. STM32MP157x-EV1 also offers the possibility to connect a MEMS
extension module.
6.15.1 Audio codec interface
The audio codec has two supplies 3V3 and 1V8 provided by STPMIC1.
The audio codec interfaces to the MPU are SAI2 and I2C2. Audio interrupt is connected to the IO-expander MFX.
SAI2A as Tx and SAI2B as Rx are connected to two dif
ferent analog interfaces of the codec, to independently
playback and record.
SAI2 is connected by default to the audio codec, and may be shared via solder bridge configuration with the
expansion GPIO connector (refer to paragraph 6.28).
I2C2 is shared with all the peripherals: Audio codec, DSI LCD, RGB LTDC, Camera, and USB Hub. The audio
codec I²C address is 0x36
Table 19. IO configuration for the Audio Codec interface
IO Board function
PI5 SAI2_SCKA
PI7 SAI2_FSA
PI6 SAI2_SDA
PF11 SAI2_SDB
PE12 SAI2_SCK_B
PE13 SAI2_FS_B
PE0 SAI2_MCLKA
PE14 SAI2_MCLKB
PH5 I2C2_SDA
PH4 I2C2_SCL
MFX_IO5 AUDIO_INT
6.15.2 Digital microphones
MB1262/U1, U2, U3 and U4 are four MP34DT01TR MEMS digital omnidirectional microphones providing PDM
(pulse density modulation) outputs. The implementation allows the beam forming.
UM2535
Audio
UM2535 - Rev 2
page 23/59