[SI-LIST] SSTL-2 series terminations

  • From: Anand.Kuriakose@xxxxxxxxxx
  • To: si-list@xxxxxxxxxxxxx
  • Date: Mon, 10 Jun 2002 19:51:58 +0630



Hi SI gurus,

The series resister mentioned in the SSTL-2 spec is meant to isolate the long
stubs (viz stubs on the DDR modules) off the main bus. I am not able to figure
out how this is acheived with the series resister. I understand that the series
resister damps the reflections. Can somebody out there help me understand how
this works.

Also i notice that the guidelines mentioned by the chipset manufacturer for DDR
signals, tellls us to place the series resister closer to the first DIMM rather
than near the controller. By placing the series resister closer to the chipset,
wont we acheive the same results?

Thanks in advance.
Regards,
Anand.


------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List archives are viewable at:     
                //www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages 
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu
  

Other related posts: