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RTC_SS
20.3.5.8 ALARM_SECONDS_REG Register (offset = 20h) [reset = 0h]
ALARM_SECONDS_REG is shown in Figure 20-68 and described in Table 20-71.
The ALARM_SECONDS_REG is used to program the second value for the alarm interrupt. Seconds are
stored as BCD format. In BCD format, the decimal numbers 0 through 9 are encoded with their binary
equivalent.
Figure 20-68. ALARM_SECONDS_REG Register
31 30 29 28 27 26 25 24
Reserved
R-0h
23 22 21 20 19 18 17 16
Reserved
R-0h
15 14 13 12 11 10 9 8
Reserved
R-0h
7 6 5 4 3 2 1 0
Reserved ALARMSEC1 ALARMSEC0
R-0h R/W-0h R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 20-71. ALARM_SECONDS_REG Register Field Descriptions
Bit Field Type Reset Description
31-7 Reserved R 0h
6-4 ALARMSEC1 R/W 0h
2nd digit of seconds, Range is 0 to 5
3-0 ALARMSEC0 R/W 0h
1st digit of seconds, Range is 0 to 9
3641
SPRUH73H–October 2011–Revised April 2013 Timers
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