The MIO pin usage is shown in the MIO Boot Interfaces. When a controller is selected to support SD, the eMMC mode cannot be used.
The SD v2.0 boot mode supports the SD2.0 specification. The SD v3.0 boot modes support the SD3.0 specification with an external SD3.0 compliant voltage-level shifter.
In the SD boot modes, the RCU BootROM runs at an SD device clock frequency between 8.7 MHz and 19.3 MHz dependent on the REF_CLK frequency. FAT 16/32 file systems are supported for reading the boot images.
The image search limit for SD boot mode is listed in the Boot Search Limit section.