Data Sheet

270
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
18.8.26 Alarm 0 Value - MODE2
Name: ALARM0
Offset: 0x18
Reset: 0x00000000
Property: Write-Protected, Write-Synchronized
The 32-bit value of ALARM0 is continuously compared with the 32-bit CLOCK value, based on the masking set by
MASKn.SEL. When a match occurs, the Alarm 0 interrupt flag in the Interrupt Flag Status and Clear register
(INTFLAG.ALARMn) is set on the next counter cycle, and the counter is cleared if CTRL.MATCHCLR is one.
z Bits 31:26 – YEAR[5:0]: Year
The alarm year. Years are only matched if MASKn.SEL is 6.
z Bits 25:22 – MONTH[3:0]: Month
The alarm month. Months are matched only if MASKn.SEL is greater than 4.
z Bits 21:17 – DAY[4:0]: Day
The alarm day. Days are matched only if MASKn.SEL is greater than 3.
z Bits 16:12 – HOUR[4:0]: Hour
The alarm hour. Hours are matched only if MASKn.SEL is greater than 2.
z Bits 11:6 – MINUTE[5:0]: Minute
The alarm minute. Minutes are matched only if MASKn.SEL is greater than 1.
z Bits 5:0 – SECOND[5:0]: Second
The alarm second. Seconds are matched only if MASKn.SEL is greater than 0.
Bit 3130292827262524
YEAR[5:0] MONTH[3:2]
AccessR/WR/WR/WR/WR/WR/WR/WR/W
Reset00000000
Bit 2322212019181716
MONTH[1:0] DAY[4:0] HOUR[4]
AccessR/WR/WR/WR/WR/WR/WR/WR/W
Reset00000000
Bit 151413121110 9 8
HOUR[3:0] MINUTE[5:2]
AccessR/WR/WR/WR/WR/WR/WR/WR/W
Reset00000000
Bit 76543210
MINUTE[1:0] SECOND[5:0]
AccessR/WR/WR/WR/WR/WR/WR/WR/W
Reset00000000