16.5 SDMMC0 and SDMMC1 boot issue

The card detect pin is not correctly sampled in the ROM code, which leads to a nondeterministic boot ability on the SDMMC0/SDMMC1 interfaces (SDCard or eMMC).

Work around

Use another boot media (e.g., serial flash) for the first level boot, and either deactivate the boot on SDMMC0/1 in the Boot Configuration Word in the Fuse area or remove any bootable program stored in the eMMC or SDCard connected to the chip at startup.

Affected Silicon Revisions