9.5.1 Description

The Secure Digital MultiMedia Card Controller (SDMMC) supports the embedded MultiMedia Card (e.MMC) Specification V5.1, the SD Memory Card Specification V3.0, and the SDIO V3.0 specification. It is compliant with the SD Host Controller Standard V3.0 specification.

The SDMMC includes the register set defined in the “SD Host Controller Simplified Specification V3.00” and additional registers to manage e.MMC devices, sampling tuning procedure, PAD calibration and enhanced features.

The SDMMC is clocked by two asynchronous clocks (HCLOCK, GCLK) (see Block Diagram) and requires the PMC to be configured first.