[SI-LIST] DDR2 design issues?
- From: icer world <icermail@xxxxxxxxx>
- To: SI LIST <si-list@xxxxxxxxxxxxx>
- Date: Tue, 25 Mar 2008 05:00:51 -0700 (PDT)
hello everyone:
I will use DDR2 in my design ,and the DDR2 controller surpport ODT function
.I think if I take use of ODT function ,pull-up resistor connected
to VTT (0.5VDD) will not be needed in all the signal pins.But I got a demo
design from chip applier that use 50ohm pull-up resistor connected
to VTT in all the signal pins.Can anyone tell me whether pull-up resistor
connected to VTT is needed in my design?If needed,please tell me how to design
it ,thanks!
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