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MPR_Read_function : dependency cycle between ACTIVATE and PRECHARGE commands

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promach

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Could anyone comment on the vicious dependency cycle between ACTIVATE and PRECHARGE commands for MPR_Read_function mode (page 150) as shown in the following two screenshots ?

1625304862416.png


1625304872662.png
 

The MPR_Read_function mode is working now in Modelsim simulation.

However, why at time = 702051705 ps , simulation waveform shows 0 , but the modelsim console transcript log shows 1 instead ?

I have thought about DQS centering in this case, but phase-shifting DQ to both left and right by 90 degrees still give contradictory result.

Remember that timing cursor corresponds to the fourth piece of data being read during MPR_Read_function mode.

1625334500504.png
 

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