The controller monitors the SDx_CD_b input signal to detect when a card is inserted or removed.
Debouncing logic is included on this input to filter false transitions. Insertion and removal events that are detected on the card detect signal are posted in the interrupt status register.
- Card detection uses the SD host control register card detect signal bit as the selection bit
- If the SD control register card detection bit = 1, the card is inserted during boot time or an eMMC
- If the SD control register card detection bit = 0, the SD slot interface is used to identify the insertion and removal of the card using the MIO pin