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ADV8005 DDR2 Loopback issue

Question asked by HankZ on Oct 20, 2014
Latest reply on Oct 21, 2014 by DaveD

I have a ADV8005 evaluation board that I am trying to get the DDR2 loopback test working on.  I have tried both the two memory DDR2 loopback test and single memory DDR2 loopback test by performing the I2C writes indicated in the HW manual:

 

Two memory:

1A 1A5B 22 ; Recommended Write

1A 1A5F 00 ; Recommended Write

1A 1A61 06 ; Recommended Write

1A 1AA0 13 ; Recommended Write

1A 1AA1 01 ; Recommended Write

1A 1AA2 25 ; Recommended Write

1A 1AA3 1D ; Recommended Write

1A 1AA4 81 ; Recommended Write

1A 1AA5 81 ; Recommended Write

1A 1AA7 53 ; Recommended Write

1A 1AA8 B4 ; Recommended Write

1A 1AFE 08 ; Recommended Write

1A 1A0B 10 ; Recommended Write

1A E649 40 ; Recommended Write

 

Single memory:

1A 1A5B 22 ; Recommended Write

1A 1A5C 20 ; Recommended Write

1A 1A5E 80 ; Recommended Write

1A 1A5F 00 ; Recommended Write

1A 1A61 06 ; Recommended Write

1A 1AA0 13 ; Recommended Write

1A 1AA1 01 ; Recommended Write

1A 1AA2 25 ; Recommended Write

1A 1AA3 1D ; Recommended Write

1A 1AA4 81 ; Recommended Write

1A 1AA5 81 ; Recommended Write

1A 1AA7 53 ; Recommended Write

1A 1AA8 B4 ; Recommended Write

1A 1AB2 02 ; Recommended Write

1A 1AFE 08 ; Recommended Write

 

When I read address 0x1AE1, I always get a value of 0x0 indicating the test is not complete.  Am I missing any key writes to get the DDR2 loopback test to work?

Thanks.

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