SPRZ398K November 2012 – September 2024 DRA745 , DRA746 , DRA750 , DRA756
Bus Testing Commands CMD19 Incorrectly Waits for CRC Status Return
Low
CMD19/CMD14 commands are required for MMC to test data bus pins functionality. After the MMC controller sends out CMD19, it incorrectly waits for the CRC status to be returned. Because no CRC status is generated by the card at this step, the MMC controller signals an interrupt for Data Timeout (DTO).
Ignore DTO generated after CMD19 is sent, then clear the interrupt and proceed with CMD14.
SR 2.0, 1.1, 1.0
TDA2x: 2.0, 1.1, 1.0
DRA75x, DRA74x: 2.0, 1.1, 1.0
AM572x: 2.0, 1.1