Working with DDRs in PrimeTime

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Working with DDRs in PrimeTime
Andrew Cheng
Cisco Systems
170 West Tasman Dr.
San Jose, CA 95134

ABSTRACT
The timing of I/O interfaces can present some challenges for users of STA tools. This paper will
discuss using PrimeTime to tackle one of today's common I/O timing problems – the Double
Data Rate (DDR) interface.
Building on the techniques for source-synchronous interfaces covered in last year's "Complex
Clocking Situations" paper [1], the authors will demonstrate how to correctly analyze and
constrain several different implementations of the DDR interface. In the process, the authors will
demonstrate a number of generally useful PrimeTime techniques with application beyond DDRs.

 

[spauls]

is there any other paper anybody can load on DDR , I need it.

 

[sree205]

hi spauls, don't mistake me for asking this. have u tried the data sheet of DDRs from micron or hynix ?

**broken link removed**

 

[maksya]

is there any other paper anybody can load on DDR , I need it.

Double Data Rate (DDR) SDRAM Specification by JEDEC. Is it useful for you? I can upload it at any time.

 

[spauls]

maksya,
Pls upload it.
Thanks !!

 

[aravind]

Hi maksya ,
can u please upload it soon,
looking for it .
Thanks

 

[sree205]

hi, if you can go to jedec website, its available free of cost.

www.jedec.org

 

[maksya]

https://www.jedec.org/DOWNLOAD/pub21/HotDDR/Default.cfm - Exactly

And there is a good article for DDR design - **broken link removed**