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'.
  0x20 32 PAC Write-Protection, Write-Synchronized 0x00000000    
Parent topic: Register Description - Mode 2 - Clock/Calendar

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

Bit  31 30 29 28 27 26 25 24  
  YEAR[5:0] MONTH[3:2]  
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  23 22 21 20 19 18 17 16  
  MONTH[1:0] DAY[4:0] HOUR[4]  
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 14 13 12 11 10 9 8  
  HOUR[3:0] MINUTE[5:2]  
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  7 6 5 4 3 2 1 0  
  MINUTE[1:0] SECOND[5:0]  
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  

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.