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[SI-LIST] Resistors to use for DDR termination

  • From: "Dimiter Popoff" <dp@xxxxxxxxxxx>
  • To: <si-list@xxxxxxxxxxxxx>
  • Date: Tue, 12 Jul 2005 16:41:11 +0300
I am routing a board with an MPC5200 (freescale/mot) which has a
DDR interface (133 MHz clock). What sort of termination resistors (resistor 
arrays?)
do I put? Thera are just so many of them, I begin wondering how
forgiving the 133 MHz interface is and could I get away by just routing
without any terminating restors at <2 inches trace length... I did that
with SDRAM and it worked, now actually I won't be that daring, I cannot
afford a failed board design, it's just the vast number of resistors which
brings these thoughts.
 Thanks in advance for the shared experience,

Dimiter

------------------------------------------------------
Dimiter Popoff               Transgalactic Instruments

http://www.tgi-sci.com
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