In VF5xx/wakeup sources of WKPU_WISR thread, I got the following answer.
・One of them, WKPU_M4IF (source - PIT), appears to be incorrect (to be removed in the next Reference Manual revision).
When I stop PIT, I do not LPSTOP3 cancellation. And, when PIT moves, I do LPSTOP3 cancellation.
From the above, I doubt that I do wakeup from LPSTOP3 in PIT.
I confirmed that I removed LPSTOP3 in wakeup trigger of PIT.Then it contradicts this answer.
WKPU register is abnormal, too.The WKPU register after the LPSTOP3 cancellation is follows.
WKPU_WISR = 0x00400000
WKPU_IRER = 0x00013006
WKPU_WRER = 0x00013006
WKPU_NCR = 0x00000000
WKPU_NSR = 0x00000000
Wakeup becomes the factor of WKPU_WISR = 0x00400000, but is a bit not to exist.
Is PIT wakeup trigger of WKUP?
What WAKEUP source does WKPU_WISR = 0x00400000 mean?
Please tell me the method to mask PIT wakeup trigger.