24.8.6 Interrupt Flag Status and Clear in COUNT16 mode (CTRLA.MODE=1)

Note: Interrupt flags must be cleared and then read back to confirm the clear before exiting the ISR to avoid double interrupts.

Table 24-25. Register Bit Attribute Legend
Symbol	Description	Symbol	Description	Symbol	Description
R	Readable bit	HC	Cleared by Hardware	(Grey cell)	Unimplemented
W	Writable bit	HS	Set by Hardware	X	Bit is unknown at Reset
K	Write to clear	S	Software settable bit	—	—

Name:	INTFLAG
Offset:	0x0C
Reset:	0x0000
Property:	-


Bit	15	14	13	12	11	10	9	8
	OVF	TAMPER			CMP3	CMP2	CMP1	CMP0
Access	R/W	R/W			R/W	R/W	R/W	R/W
Reset	0	0			0	0	0	0


Bit	7	6	5	4	3	2	1	0
	PER7	PER6	PER5	PER4	PER3	PER2	PER1	PER0
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0

Bit 15 – OVF Overflow

This flag is cleared by writing a '1' to the flag.

This flag is set on the next CLK_RTC_CNT cycle after an overflow condition occurs, and an interrupt request will be generated if INTENCLR/SET.OVF is '1'.

Writing a '0' to this bit has no effect.

Writing a '1' to this bit clears the Overflow interrupt flag.

Bit 14 – TAMPER Tamper

This flag is set after a tamper condition occurs, and an interrupt request will be generated if INTENCLR.TAMPER/ INTENSET.TAMPER is one.

Writing a '0' to this bit has no effect.

Writing a one to this bit clears the Tamper interrupt flag.

Bits 8, 9, 10, 11 – CMPn Compare n [n = 3..0]

This flag is cleared by writing a '1' to the flag.

This flag is set on the next CLK_RTC_CNT cycle after a match with the compare condition, and an interrupt request will be generated if INTENCLR/SET.COMPn is one.

Writing a '0' to this bit has no effect.

Writing a '1' to this bit clears the Compare n interrupt flag.