Hello,
What I am trying to do is to trigger a reset by not refreshing the Watchdog timer.
I do not understand this. Reset by not refreshing the SWT? So it is reset in SWT timeout?
If yes, than just configure SWT to trigger reset on SWT expire. (in SWT and FCCU module) if not configured yet.
I get the bit F_SWT0_RES set in MC_RGM_DES every time.
If you are not refreshing the SWT, than it is correct.
The confusion is now I do not know if the reset was caused by SWT0 reset or if a Flash initialization failure has occurred.
Well if the flash init failure is the reason than SWT will trigger destructive reset after the flash init is done until the flash initialization is correctly done or reset escalation is triggered.
In order to ensure that this happens within a reasonable time, the SWT is brought out of reset for PHASE2[FUNC]/PHASE2[DEST] RESET. So, if the SWT times out during this time, the flash’s initialization sequence was not able to complete. This is also referred as SWT0 (flash initialization error).
In order to trigger another attempt at initializing the flash, a ‘destructive’ reset is generated. If it occurs repeatedly, the ‘destructive’ reset escalator in the MC_RGM will increment until it finally keeps the chip in reset until the next power-on reset. This is to prevent unnecessary power consumption due to reset cycling.
But I think there is not possible to recognize the root cause of SWT timeout.
I wanted know if F_SWT0_RES bit is set exclusively for Flash initialization failure.
Or does SWT0 triggers a destructive reset which causes this bit to set?
SWT0 trigger dest reset which set F_SWT0_RES.
regards,
Peter
