The DDR (Double Data Rate RAM Memory) Validation tool (DDRv) is a licensed software application that can only be purchased as part of CodeWarrior® Development Suites for Networked Applications and only used inside of the CodeWarrior Development Studio for Power Architecture
The DDR (Double Data Rate RAM Memory) Validation tool (DDRv) is a software application that helps you “tune” the DDR settings that can be the most difficult to get "centered."
In the world of DDR, there are many settings for which the DDR will pass all tests and work on the test bench. However, a setting that worked on the test bench may be only 1/8 (or less) clock cycle from not working in your application. This is what most of us would call a “skinny margin.”
The DDRv tool will help you find all the settings that work, display them on a visual map allowing you to then select a setting that provides as much margin between working settings and non-working settings in your application.
This process can be extremely difficult and generally requires specialized software running large exhaustive tests on very large memories. As you run these tests, you need to vary each setting against other varying settings – basically setting up a geometric progression that is very time consuming, complex and fraught with problems. Furthermore, you must track what worked, what didn’t work, and then have some way to make sense from all that data. The DDRv tool does this for you.
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