Why do writes to an M20K fail after a Partial Reconfiguration?

Description

Due to a problem in the Quartus® Prime Pro Edition Software version 23.2 and later, you might see a functional failure when writing to an M20K RAM after Partial Reconfiguration. This problem only occurs in design targets an Agilex™ 7 F/I-Series devices and either of these conditions

• The Compiler Optimization Mode is not set to Performance
• The design has 2 or more abutting PR partitions that share the same clock.

Resolution

To workaround this problem, perform these options

• Recompile the design with Compiler Optimization Mode set to one of the Performance options.

 

 

• Ensure there is a separation (at least one row/column space) between abutting PR partition routing regions for the designs with more than one PR region.

 

Note: This restriction does not apply to Agilex™ 7 M-series production devices.

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Why does my M20K RAM write fail after a Partial Reconfiguration operation?