FreeLists / si-list / [SI-LIST] SDRAM Termination

[Saril <saril_k@xxxxxxxxx>]

Hi,
   
  We have an External Memory Interface Bus, which is shared by Boot FLASH and 
SDRAM memories. This triggers a Daisy chain topology, we decided to use a 33 
ohm series termination resistor near to the CPU bga balls and route to SDRAM 
first, then take it to the FLASH. But there is one more suggestion, put a 50ohm 
parallel termination ( trace impedance is 50 ohm) to ground at the end of the 
trace near to FLASH, but it will consume more current.
   
  Can anybody please give a good termination strategy for this Daisy chain 
topology?
   
  Thanks and regards
  Saril Kaiprath
  Design Engineer
  FDL
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