Article ID: 000078666 Content Type: Troubleshooting Last Reviewed: 11/18/2017

Synchronizing aclr with rdclk and wrclk Causes a Recovery Timing Violation in the DCFIFO IP that Connects to MLAB

Environment

    Intel® Quartus® Prime Pro Edition
    Intel® Quartus® Prime Standard Edition
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Critical Issue

Description

If your design uses MLAB as RAM block type and you select the add circuit to synchronize aclr with wr/rdclk option in the Dual Clock FIFO (DCFIFO) IP Parameter Editor GUI, the read clock domain-synchronized aclr signal erroneously connects to the top-level aclr signal, instead of connecting to the MLAB\'s clr signal.

This issue affects the Quartus® Prime Standard Edition software and the Quartus Prime Pro Edition software.

Resolution

Instead of selecting the add circuit to synchronize aclr with wr/rdclk optioni n the DCFIFO IP Parameter Editor GUI, create your own reset synchronizer.

Related Products

This article applies to 1 products

Intel® Programmable Devices

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