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Altera_Forum
Honored Contributor I
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"ERROR: tRFC maximum violation during No Op" occur in modelsim simulation!

In my project, i add a DDR2 HPCII and some other avalon master in SOPC system. when simulation in modelsim, error "tRFC maximum violation during No Op" occur in modelsim simulation!" occured after running a certain time. and then simulation is paused. 

 

I have checked the parameter set for the DDR2 HPCII. and the tRFC is set to 105 ns. it's the same as the parameter set in ddr2_parameter.vh, which is as follow: 

 

parameter TRFC_MIN = 105000; 

parameter TRFC_MAX =70000000; 

 

need help!
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