SPRUJ17H March 2022 – October 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
There are two types of data transfer:
There are specific commands for each type of operation (sequential or block-oriented). See the Multimedia Card System Specification, the SD Memory Card Specifications, and the SDIO Card Specification.
Stream commands are supported only by MMC cards.
Figure 13-174 and Figure 13-175 show how sequential operations are defined. Sequential operation is only for 1-bit transfer and initiates a continuous data stream. The transfer terminates when a stop command follows on the mmc_cmd line.
Figure 13-176 and Figure 13-177 show how multiple block-oriented operations are defined. A multiple block-oriented operation sends a data block plus CRC bits. The transfer terminates when a stop command follows on the mmc_cmd line. These operations are available for all kinds of cards.