SPRUJ17H March 2022 – October 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
The MMC/SD/SDIO host controller can be use in two modes, MMC and SD/SDIO modes. It has been designed to be the most transparent with the type of card. The type of the card connected is differentiated by the software initialization procedure.
Software identifies the type of card connected during software initialization. For each given card type, there are corresponding commands. Some commands are not supported by all cards. See the Multimedia Card System Specification, the SD Memory Card Specifications, and the SDIO Card Specification, Part E1 for more details.
The purpose of the module is to transfer commands and data, to whatever card is connected, respecting the protocol of the connected card. Writes and reads to the card must respect the appropriate protocol of that card.