ST STM32MP157F-EV1 User Manual

6.14 microSD card
The MB1263/CN9 slot for microSD card is routed to the STM32MP157FAA1 SDMMC1 port. This SD card
interface is compliant 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 18 describes the I/O for the SDMMC1 interface.
Table 18. I/O configuration for the SDIO interface
I/O
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 19 describes the SDCARD connector pinout MB1263/CN9.
UM2648
microSD card
UM2648 - Rev 1
page 22/61

ST STM32MP157F-EV1 Specifications

General

Brand	ST
Model	STM32MP157F-EV1
Category	Motherboard
Language	English