AR# 47574

Zynq-7000, Boot - MIO Pins are not Three-Stated when ErrorLockDown Occurs

Description

The MIO I/O Buffers are not three-stated when the BootROM detects an error that forces the system into the ErrorLockDown state.

Solution

Impact:
Trivial. There is no functional impact to the user. This feature is documented to announce a change of behavior in future silicon revisions.
Work-around:
No work-around needed.
Configurations Affected:
All.
Device Revision(s) Affected: Refer to Zynq-7000 Device Advisory Master Answer Record


The Boot ROM can go into an error lockdown state for a number of reasons, including user error, for example by selecting an incorrect boot mode. If an ErrorLockDown occurs, silicon should pull-up and three-state all MIO pins to reduce the risk of damage to Zynq parts and other devices on the board.

AR# 47574
Date 08/07/2012
Status Active
Type Design Advisory
Devices