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AR# 52016 Zynq-7000 AP SoC, Boot IOP - SDIO boot mode tests for Card Detect on MIO pin 0

Description

During an SDIO 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.

Solution

If the pin is High, the boot 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 Zynq-7000 Design Advisory Master Answer Record

Revision History

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

Actions

AR# 52016
Date Created 10/25/2012
Last Updated 11/19/2012
Status Active
Type Design Advisory
Devices
  • Zynq-7000
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