SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
An abort transaction is performed by issuing CMD12 for a SD memory card and by issuing CMD52 for a SDIO card. There are two cases where the Host Driver needs to do an Abort Transaction. The first case is when the Host Driver stops Infinite Block Transfers. The second case is when the Host Driver stops transfers while a Multiple Block Transfer is executing.
There are two ways to issue an Abort Command. The first is an asynchronous abort. The second is a synchronous abort. In an asynchronous abort sequence, the Host Driver can issue an Abort Command at any time unless MMCSD0_PRESENTSTATE[0] INHIBIT_CMD bit is set to 1. In a synchronous abort, the Host Driver shall issue an Abort Command after the data transfer stopped by using MMCSD0_BLOCK_GAP_CONTROL[0] STOP_AT_BLK_GAP bit.