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AR# 61909

UltraScale DDR3/DDR4 - app_wdf_data format clarification


Version Found: DDR4 v6.0, DDR3 v6.0

Version Resolved: See (Xilinx Answer 69035) for DDR4, See (Xilinx Answer 69036) for DDR3

The format for using app_wdf_data to provide data with the write data command is as follows:

Burst Length: 8

8-bit design:

app_wdf_data={Burst7Byte0, Burst6Byte0, Burst5Byte0, Burst4Byte0, Burst3Byte0, Burst2Byte0, Burst1Byte0, Burst0Byte0}

16-bit design:

app_wdf_data={Burst7Byte1, Burst7Byte0, Burst6Byte1, Burst6Byte0, Burst5Byte1, Burst5Byte0, Burst4Byte1, Burst4Byte0, 
                          Burst3Byte1, Burst3Byte0, Burst2Byte1, Burst2Byte0, Burst1Byte1, Burst1Byte0, Burst0Byte1, Burst0Byte0}


(PG150) will be updated with a more detailed explanation of the app_wdf_data format and example.

Revision History

09/03/2014 - Initial Release

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
69036 UltraScale/UltraScale+ DDR3 - Release Notes and Known Issues N/A N/A
69035 UltraScale/UltraScale+ DDR4 - Release Notes and Known Issues N/A N/A
AR# 61909
Date 12/21/2017
Status Active
Type Known Issues
  • Kintex UltraScale
  • Virtex UltraScale
  • MIG UltraScale
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