[SI-LIST] Re: How to calculate to Length Matching rules for DDR
- From: "Istvan Nagy" <buenos@xxxxxxxxxxx>
- To: "Karthik P" <karthik_package@xxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Sun, 22 Aug 2010 09:23:18 +0100
Hi
I made this calculator to calculate the things you are talking about:
http://www.buenos.extra.hu/iromanyok/PCB_Timing_analysis.xls
if you want to find formulas, search google for "timing analysis".
or check this:
http://www.buenos.extra.hu/iromanyok/PCB_Timing_analysis.xls
regards,
Istvan Nagy
Bluechip Technology
----- Original Message -----
From: "Karthik P" <karthik_package@xxxxxxxxx>
To: <si-list@xxxxxxxxxxxxx>
Sent: Sunday, August 22, 2010 7:39 AM
Subject: [SI-LIST] How to calculate to Length Matching rules for DDR
> Hi All,
> I would like to know about Timing analysis calculation for DDR2/DDR3. I
> know about the thumb rules and tolerance for each databyte lane include 8
> databits(DQ0:7), 1 DataMask(DM0), 1 Data strobe(DQS0).
>
> But I want to know how to calculate the tolerance or length matching
> values i.e formula . Most of the material simply have notes on thumb rules
> but not exact way how to calculate those values.
>
> So if anyone have materials for calculating the length matching signals,
> kindly do share with me.
>
> Thanks
> Karthik
>
>
>
>
>
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