• From: Ravinder.Ajmani@xxxxxxxx
  • To: <si-list@xxxxxxxxxxxxx>
  • Date: Thu, 23 Oct 2003 16:21:23 -0700

Hi All,
My question is about DQS interface between DDR DRAM and ASIC.  Our current 
design uses a single 32 bit wide DDR DRAM with one DQS between DRAM and 
ASIC.  I have to replace the DRAM with another type of DRAM with 4 DQS 
signals, and make it work with the single DQS pin on the ASIC.  Is there 
someone who has tried this before, and is it something which can be 
achieved with simple glue logic.  Can I just use a quad bidirectional 
transceiver on DQS lines between ASIC and DRAM, shorting the four I/Os 
together on the ASIC side, or will this require a more sophisticated 
solution.  I will have to adjust the Data signals to match with the extra 
delay and capacitance on the DQS.
Thank you very much in advance.
Regards, Ravinder
Server PCB and Flex Development
Hitachi Global Storage Technologies

Email: Ravinder.Ajmani@xxxxxxxx

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