| AR# |
30926 |
| Part |
IP-MPMC |
| Last Modified |
2008-05-29 00:00:00.0 |
| Status |
Active |
| Keywords |
Virtex-5, error, underflow |
Description
Keywords: Virtex-5, error, underflow
When filling MPMC block RAM-based write FIFOs with more than two 64-word transfers worth of data, data corruption occurs. It seems to occur only in Virtex-5 devices. How do I resolve this issue?
Solution
To work around this issue, do not allow more than two 64-word transfers of data to accumulate into the block RAM FIFOs.
A patch is available for MPMC v4.01.a. To use this patch:
-Download and extract the ZIP file from the following location:
ftp://ftp.xilinx.com/pub/applications/misc/ar30926.zip-Copy the MPMC_v4_01_a directory to the local project pcore directory
-Replace the pcore/mpmc_v4_01_a/hdl/verilog/mpmc_bram_fifo.v with the included file
-Choose Project->Rescan User Repositiories
This issue is fixed starting with MPMC v4.02.a, to be released starting with EDK 10.1 Service Pack 2.
