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Memory

5.3. SD/MMC

5.3.1. Overview

The SD/MMC controller can be configured either as a Secure Digital Multimedia Card controller, which simultaneously

supports Secure Digital memory (SD Memory), Secure Digital I/O (SDIO), Multimedia Cards (MMC), eMMC Card.

The SD/MMC controller includes the following features:

 Supports Secure Digital memory protocol commands (up to SD2.0)

 Supports Secure Digital I/O protocol commands

 Supports Multimedia Card protocol commands (up to eMMC4.41)

 Supports eMMC boot operation

 Supports one SD (Verson1.0 to 2.0) or MMC (Verson3.3 to eMMC4.41)

 Supports hardware CRC generation and error detection

 Supports host pull-up control

 Supports SDIO interrupts in 1-bit and 4-bit modes

 Supports SDIO suspend and resume operation

 Supports SDIO read wait

 Supports block size of 1 to 65535 bytes

 Supports descriptor-based internal DMA controller

 Internal 128 bytes FIFO for data transfer

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