SPRUIL1D May 2019 – December 2024 DRA829J , DRA829J-Q1 , DRA829V , DRA829V-Q1 , TDA4VM , TDA4VM-Q1
There are two types of data transfer:
There are specific commands for each type of operation (sequential or block-oriented).
For information about commands and programming sequences supported by the MMC, SD, and SDIO devices, see the Multimedia Card System Specification, SD Memory Card Specifications, and SDIO Card Specification (Part E1).
Figure 12-287 and Figure 12-288 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 CMD line.
Stream commands are supported only by MMCs.
Figure 12-289 and Figure 12-290 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 CMD line. These operations are available for all kinds of devices (MMC, SD, SDIO).