Zynq PS SDIO
SDIO MIO Settings in PS7 IP Configuration if external level shifter is used:
- speed (slew rate): fast
- pullup: disabled
It is important to disable the pullups, otherwise some SD card may exhibit systematic or random problem at initialization.
Level shifter
Modules that expose SDIO Interface on the B2B Connector from 1.8V VCCIO bank need SD Level shifter IC on the baseboard.
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