ALARM

Alarm Value in Clock/Calendar mode (CTRLA.MODE=2)

The 32-bit value of ALARM is continuously compared with the 32-bit CLOCK value, based on the masking set by MASK.SEL. When a match occurs, the Alarm n interrupt flag in the Interrupt Flag Status and Clear register (INTFLAG.ALARM) is set on the next counter cycle, and the counter is cleared if CTRLA.MATCHCLR is '1'.

Name:: ALARM
Offset:: 0x20
Reset:: 0x00000000
Access:: PAC Write-Protection, Write-Synchronized

Bit31	30	29	28	27	26	25	24
YEAR[5:0]						MONTH[3:2]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0
Bit23	22	21	20	19	18	17	16
MONTH[1:0]		DAY[4:0]					HOUR[4:4]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0
Bit15	14	13	12	11	10	9	8
HOUR[3:0]				MINUTE[5:2]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0
Bit7	6	5	4	3	2	1	0
MINUTE[1:0]		SECOND[5:0]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0

Bits 31:26 – YEAR[5:0]: Year

Year

The alarm year. Years are only matched if MASK.SEL is 6

Bits 25:22 – MONTH[3:0]: Month

Month

The alarm month. Months are matched only if MASK.SEL is greater than 4.

Bits 21:17 – DAY[4:0]: Day

Day

The alarm day. Days are matched only if MASK.SEL is greater than 3.

Bits 16:12 – HOUR[4:0]: Hour

Hour

The alarm hour. Hours are matched only if MASK.SEL is greater than 2.

Bits 11:6 – MINUTE[5:0]: Minute

Minute

The alarm minute. Minutes are matched only if MASK.SEL is greater than 1.

Bits 5:0 – SECOND[5:0]: Second

Second

The alarm second. Seconds are matched only if MASK.SEL is greater than 0.