DDR Test FAQ

Related questions before testing

1. What needs to be provided before DDR testing? 

For more, please refer to DDR test process

 

2. What is the sample setting before DDR test? 

If your product does not reserve test points, the samples need to be carried out on the interposer board. If you need GRL to assist in the production of interposer board, please provide the product pin map and contact GRL.

Please “Contact GRL” to ensure that your product can be tested smoothly.

 

Related issues in the test

1. Related issues in the test

When testing, the side object must be able to maintain the continuous transmission function to have a signal to test.

Please “Contact GRL” to ensure that your product can be tested smoothly.

 

2. Do you need to test all DDR signal? How to chose test signals?

Because there are too many signals, we usually do not test all the signals. We would recommend testing Clock, DQ/DQS/ADD/COM. Generally, we will select the longest and shortest distances for testing, or estimate that the customer’s DQ may be poor. The signal is tested.

 

Related issues after testing

1. Can the sample be taken back after the test is completed? 

Yes, but if your product is special, GRL may investigate your consent and keep samples for 2 months.