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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.

 

Correct settings for SDIO MIO pins, speed fast, pullup disabled.

Level shifter

Modules that expose SDIO Interface on the B2B Connector from 1.8V VCCIO bank need SD Level shifter IC on the baseboard.

When using TXS02612 as SDIO level shifter external pullups should not be used on CMD and DAT lines.

TE0701 and TE0703 have pullup resistor on CMD line, which should be removed:

BaseCMD pullup ResistorRemoved since
TE0701

R43

TE0701-05 Serial number: TBD
TE0703

R43

 

TE0703-04 Serial number: TBD

 

 

 

 

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