Why is there no CLEAR_FAULTS command sent for Intel Agilex® devices in Master Mode after detecting non-zero value in STATUS_BYTE?

Due to a problem in Intel® Quartus® Prime Pro Edition Software versions 21.3 and 21.4, you may see SEU errors remain once the error flag is asserted and where the STATUS_BYTE not equal to zero. The Power Management Firmware (PMF) versions 21.3 and 21.4 do not send a CLEAR_FAULTS command to clear the error flag.

This problem is fixed beginning with the Intel® Quartus® Prime Pro Edition Software version 22.1.

Here is the firmware flow for sending the CLEAR_FAULTS command starting with version 22.1 :

1. Power up
2. FW reads STATUS_BYTE
3. FW sends CLEAR_FAULTS if step 2 returns a non-zero value (new in v22.1)        
4. FW polls STATUS_BYTE every 500ms
5. SEU detection IP flags the error when STATUS_BYTE !=0, an error will be put into Error Message Queue (EMQ) 
6. FW sends CLEAR_FAULTS if step 4 returns a non-zero value (new in v22.1)
7. Go to step 4

If the slave device type is set to “Other” in Intel® Quartus® Prime GUI, steps 4-7 will not be executed.