SPRUJ52C june 2022 – july 2023 AM69 , AM69A , TDA4AH-Q1 , TDA4AP-Q1 , TDA4VH-Q1 , TDA4VP-Q1
In order to detect timeout errors on DAT line, the Host Driver shall execute the following two steps before any SD transaction. For more information regarding SD transactions:
(1) Calculate a divisor to detect timeout errors by reading MMCSD0_CAPABILITIES[5-0] TIMEOUT_CLK_FREQ bit field and MMCSD0_CAPABILITIES[7] TIMEOUT_CLK_UNIT bit. If MMCSD0_CAPABILITIES[5-0] TIMEOUT_CLK_FREQ bit field is 00 0000b, the Host System shall provide this information to the Host Driver by another method.
(2) Set MMCSD0_TIMEOUT_CONTROL[3-0] COUNTER_VALUE bit field in accordance with the value from step (1) above.