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AR# 31449

10.1 EDK, ppc440mc_ddr2 - tRFC is violated during calibration

Description

During the calibration stage of the memory, the ppc440mc_ddr2 does not provide a refresh. In simulation, a memory model might occur, such as:

# 1127510100.0 ps : system_tb.DDR2.cmd_task : ERROR: tRFC maximum violation during No Op

Solution

The lack of a refresh during calibration is not expected to cause issues in hardware.

This issue is planned to be fixed in the newest ppc440mc_ddr2 core to be released in EDK 11.1.

AR# 31449
Date Created 08/13/2008
Last Updated 12/15/2012
Status Active
Type General Article