Product Card

6.14 microSD card
The MB1263/CN9 slot for microSD card is routed to STM32MP157xAA3 SDMMC1 port. This SD card interface is
compliance with SD Memory Card Specification V
ersion 3.01, UHS-I, all operation modes up to SDR104 and
DDR50. The SD card interface is compatible with 1.8 V or 2.9 V signal levels.
6.14.1 SD card interface
The SD card interface, SDMMC1, is 4-bit wide with level shifter support, in order to connect to an SD 3.0-
compliant bidirectional dual voltage level translator
, interfacing with the memory card inserted in the SDCARD
connector.
Table 17 describes the IO for the SDMMC1 interface.
Table 17. IO configuration for the SDIO interface
IO
Signal
(1)
PC12 SDMMC1_CK
PE4 SDMMC1_CKIN
PD2 SDMMC1_CMD
PB9 SDMMC1_CDIR
PC8 SDMMC1_D0
PC9 SDMMC1_D1
PC10 SDMMC1_D2
PC11 SDMMC1_D3
PF2 SDMMC1_D0DIR
PC7 SDMMC1_D123DIR
PF14 uSD_LDO_SEL
1.
Minimum set of signals required by the boot ROM during SD card boot in bold
Figure 11 shows the SDCARD connector pinout MB1263/CN9.
Figure 11. SDCARD connector pinout MB1263/CN9
Table 18 describes the SDCARD connector pinout MB1263/CN9.
UM2535
microSD card
UM2535 - Rev 2
page 22/59