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Original question:

SK-AM62A-LP: Periodic WDQ leveling

AM6422: DQ shift to DQs

shu wang
Prodigy 40 points

Part Number: AM6422

Hi team,

We are measuring DQ SI of DRAM, and we saw some unexpected shift between the DQ and DQS. Our board trace dealy meet the requirements. So I am not sure what is making this happen.

We saw some discussion in your form about the periodic DQ training setting. But it seems these shifts are random. Ours, however, are almost all shifted.  

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Best Regards,

Shu