AR# 52016

Zynq-7000 SoC, Boot IOP - SDIO boot mode tests for Card Detect on MIO pin 0


During an SD memory card boot sequence, the BootROM reads the logic level on the MIO pin 0 as an SD Card Detect. MIO pin 0 must be Low during the SDIO boot process.


If the pin is High, the SD memory card BootROM process will fail because the BootROM will assume there is no SD card available. The design intent is for the BootROM to access the SD card without testing the card detect status.

Impact: Minor.
Work-around:Set MIO pin 0 Low during the SDIO boot sequence.
Configurations Affected: Systems that use the SDIO boot mode.
Device Revision(s) Affected:

Refer to (Xilinx Answer 47916) - Zynq-7000 SoC Silicon Revision Differences

Revision History
11/19/2012 - Updated work-around to say 'Set MIO pin 0 Low during the SDIO boot sequence.'

AR# 52016
Date 05/25/2018
Status Active
Type Design Advisory