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AR# 22230

7.1i EDK sp2 OPB_DDR_v2_00_b - The system hangs when performing burst read transaction crossing to new memory banks

Description

General Description: 

The system hangs when burst transaction occurs at the end of the memory bank crossing to a new memory bank space.

Solution

The following patch fixes the logic during burst operations that cross row or bank boundaries. 

 

Subsequent READ or WRITE commands are only issued when same_row = "1" and same_bank = "1".  

 

Included with the "opb_ddr_v2-00_b" patch is a helper library "ddr_v2_00_b".  

 

The patch that fixes this issue is available for download at: 

http://www.xilinx.com/txpatches/pub/applications/misc/opb_ddr_v2_00_b.zip
Download the patch to the "pcore" sub-directory (in your project directory) and compile the design. 

 

NOTE: This patch has the same version as the existing core in the EDK build. 

 

This patch will be available in the EDK 8.1i sp1.

AR# 22230
Date Created 09/04/2007
Last Updated 05/19/2014
Status Archive
Type General Article