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AR# 68082

Zynq UltraScale+ MPSoC - Does the PS DDR controller always drive CKE?

Description

Does the PS DDR controller always drive CKE? My concern for LPDDR3 or LPDDR4 memories is that my vendor has a reliability requirement that CKE must be driven low.

Solution

Yes, the controller will actively drive CKE, typically low. 

As a result, as long as the DRAM power is ramped up with, or later than the Zynq UltraScale+ DDR VCCO rail, this requirement should be met.

AR# 68082
Date Created 10/14/2016
Last Updated 11/01/2016
Status Active
Type General Article
Devices
  • Zynq UltraScale+ MPSoC