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AR# 43383

13.2 EDK - BSB Generated MHS parameters of AXI_V6_DDRx is incorrect for third party boards


I am attempting to generate an AXI BSB system for Avnet V6LX130T board with DDR3 included. The generated MHS parameters for theAXI_V6_DDRx core seems to be incorrect.

The following describes the BSB behavior when the Avnet V6LX130T board is used in each implementation mode:

Area Mode

  • If the default "Area" is selected, BSB ignores the DDR3 parameter settings such as the DQ and DQS width from the Avnet V6LX130T XBD2 file and instead uses the parameters for the ML605 DDR3 interface in x8 mode.
  • In the "Area" mode, BSB sets the DDR3 address range for the Avnet board to 64 MB (Avnet board has 128 MB of DDR3 and this is specified in the XBD2 file).

Throughput Mode

  • If the "Throughput" option is selected, BSB uses the DDR3 parameters from V6LX130T XBD file. However, it sets the DDR3 address range for the Avnet board to the ML605 DDR3 address range which happens to be significantly larger than the memory on the Avnet board.
  • Also, in the "Throughput" mode, BSB sets the "C_S_AXI_DATA_WIDTH" parameter to 256, which happens to be the correct parameter for the ML605 x64 DDR3 memory interface, not the Avnet board x16 DDR3.

How can I resolve this issue?


This is a known issue with BSB wherein it was not able to take the values from the XBD file. This has been fixed and a patch has been released:

To use the patch, extractitto the EDK install directory. For example: C:\Xilinx\13.2\ISE_DS\EDK.

This issue is scheduled to be fixed starting in EDK 13.3.

Linked Answer Records

Associated Answer Records

Answer Number Answer Title Version Found Version Resolved
51696 14.2 EDK - BSB Does Not Pass Peripheral Parameters From 3rd Party Board Definition Files to MHS N/A N/A
AR# 43383
Date Created 08/03/2011
Last Updated 09/07/2012
Status Active
Type Known Issues
  • EDK - 13.2