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  3. AR# 54759: MIG Zynq LPDDR2 - Incorrect indication of pullup terminator to VTT for CKE pin on UG933 (v1.3).

AR# 54759

MIG Zynq LPDDR2 - Incorrect indication of pullup terminator to VTT for CKE pin on UG933 (v1.3).

Description

On page 60 of Zynq-7000 All Programmable SoC PCB Design Guide (UG933 v1.3), LPDDR2 CKE termination is changed to pulldown from pullup to VTT.

Why is there a change?

Should CKE be terminated?

Solution

This is a documentation error. 

CKE should only have a pullup to VTT for DDR3.  

For LPDDR2 it should have a pulldown on CKE, not termination to VTT.


Revision History:

9/19/2014 - Initial Release

AR# 54759
Date 09/22/2014
Status Active
Type General Article
Devices
  • Zynq-7000