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AR# 24093

8.2i EDK SP2 - MCH OPB SDRAM v1.00.a fails in functional simulation with Read Data Comparison

Description

MCH OPB SDRAM produces "READ DATA COMPARISON" warnings during functional simulation.  

The warning states:  

 

 # ** Warning: <OPB> <MASTER> <DC> READ DATA COMPARISON ERROR : Byte lane 0 Read Addr=x0000000030000000 Expect data=x00 Actual data=x11  

 # Time: 60990 ns Iteration: 2 Instance: /opb_complex/opb_device1/dc  

 # ** Warning: <OPB> <MASTER> <DC> READ DATA COMPARISON ERROR : Byte lane 2 Read Addr=x000000003000002A Expect data=x2A Actual data=x11  

 # Time: 113530 ns Iteration: 2 Instance: /opb_complex/opb_device1/dc  

 # ** Warning: <OPB> <MASTER> <DC> READ DATA COMPARISON ERROR : Byte lane 3 Read Addr=x000000003000002A Expect data=x2B Actual data=x11  

 # Time: 113530 ns Iteration: 2 Instance: /opb_complex/opb_device1/dc  

 

These warnings occurred for the combination  

C_NUM_CHANNELS = 1  

C_INCLUDE_OPB_IPIF = 1  

C_SDRAM_BANK_AWIDTH = 2  

C_SDRAM_DWIDTH = 16  

C_SDRAM_AWIDTH = 13  

C_SDRAM_COL_AWIDTH = 9  

C_XCL0_LINESIZE = 16  

C_XCL0_WRITEXFER = 2

Solution

This problem has been fixed, put into opb_ipif_v3_01_b and rolled into opb_ipif_v3_01_a in the latest EDK 8.2i Service Pack, available at: 

http://www.xilinx.com/xlnx/xil_sw_updates_home.jsp
The first service pack containing the fix is EDK 8.2i Service Pack 2.

AR# 24093
Date Created 09/04/2007
Last Updated 05/20/2014
Status Archive
Type General Article