10.1 EDK, opb_mch_sdram_v1.01.b - Controller hangs during burst transactions

AR#	30213	Search For Another Answer
Topic	EDK-IP-Memory-Other
Last Updated	10/09/2008
Status	Active

Description

Keywords: mch, sdram, freeze, full

When using the opb_mch_sdram controller with EDK, I find that the controller hangs during bursts. The MCH Full signal is continually asserted.

How do I resolve this issue?

Solution

This issue has been worked around by modifying the mch_opb_ipif Core. Copy the mch_opb_ipif_v1_01_a Core from the EDK installation directory to the local project. Then, modify the chnl_logic.vhd file on line 756 from:
Chnl_Req <= '0' when (Addr_Master = '1') else chnl_req_reg;
to:
Chnl_Req <= chnl_req_reg;

This core is not being updated. For new designs, use the MPMC controller with the SDRAM PHY.