In all silicon revisions, the boot process caused by the PS_POR_B reset signal must not be interrupted by the assertion of the PS_SRST_B reset signal.
In pre-production silicon, the system may not lock down securely and the results are unpredictable.
In production silicon, the system will lock down if PS_SRST_B is asserted while the BootROM is executing after a POR reset.
Refer to UG585 TRM v1.7 or later, chapter 6 for a discussion.
The result of this situation is not well defined. The design intention in this situation is to cause a secure lockdown condition.
Impact: | Minor. |
Work-around: | The system designer should design and operate their system to ensure that this scenario does not occur. |
Configurations Affected: | All. |
Device Revision(s) Affected: | Refer to (Xilinx Answer 47916) Zynq-7000 SoC Silicon Revision Differences. |
Answer Number | Answer Title | Version Found | Version Resolved |
---|---|---|---|
47916 | Zynq-7000 SoC Devices - Silicon Revision Differences | N/A | N/A |
Answer Number | Answer Title | Version Found | Version Resolved |
---|---|---|---|
52847 | Zynq-7000 Board Design - Sequencing for SRST and POR Signals | N/A | N/A |
AR# 52013 | |
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Date | 05/25/2018 |
Status | Active |
Type | Design Advisory |
Devices |