[SI-LIST] : DDR SDRAM DQS vs DQ

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From: Ken Wu (ken@force10networks.com)
Date: Wed Sep 06 2000 - 17:59:25 PDT


Can anyone tell me why JEDEC specifies in DDR SDRAM spec that DQS is
edge-aligned
with data when reading from SDRAM, while center-aligned with data when
writing to SDRAM?
I don't see any reason why SDRAM cannot send out data with center-aligned
strobe.

Regards,

Ken

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