11.2 Interfacing with an SDIO/SD/MMC Device
The SAM9X75 SOM Series includes two Secure Digital Multimedia Card (SDMMC) interfaces that support the MultiMedia Card (e.MMC) specification V4.51, the SD Memory Card specification V3.0, and the SDIO V3.0 specification. They are compliant with the SD Host Controller Standard V3.0 specification.
The two interfaces can be connected to a standard SD Card, e.MMC Flash or SDIO device.
| Interface Instance | IO Set | Pin No. | PIO | Pin Name | Description |
|---|---|---|---|---|---|
| SDMMC0 | 1 | 6 | PA2 | SDMMC0_CK | SD Card/e.MMC clock signal |
| 3 | PA1 | SDMMC0_CMD | SD Card/e.MMC command line | ||
| 8 | PA0 | SDMMC0_DAT0 | SD Card/e.MMC data lines | ||
| 5 | PA3 | SDMMC0_DAT1 | |||
| 7 | PA4 | SDMMC0_DAT2 | |||
| 4 | PA5 | SDMMC0_DAT3 | |||
| SDMMC1 | 1 | 14 | PA11 | SDMMC1_CK | SD Card/e.MMC clock signal |
| 12 | PA10 | SDMMC1_CMD | SD Card/e.MMC command line | ||
| 13 | PA9 | SDMMC1_DAT0 | SD Card/e.MMC data lines | ||
| 11 | PA6 | SDMMC1_DAT1 | |||
| 10 | PA7 | SDMMC1_DAT2 | |||
| 15 | PA8 | SDMMC1_DAT3 |