User Manual
Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 552 of 909 2019 Ambiq Micro, Inc.
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This register is the Alarm settings for hours, minutes, second and 1/100th seconds settings.
12.4.2.4 ALMUP Register
RTC Alarms Upper
OFFSET: 0x0000004C
INSTANCE 0 ADDRESS: 0x4000424C
This register is the alarm settings for week, month and day.
Table 802: ALMLOW Register
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
RSVD
ALMHR
RSVD
ALMMIN
RSVD
ALMSEC ALM100
Table 803: ALMLOW Register Bits
Bit Name Reset RW Description
31:30 RSVD 0x0 RO
RESERVED
29:24 ALMHR 0x0 RW
Hours Alarm
23 RSVD 0x0 RO
RESERVED
22:16 ALMMIN 0x0 RW
Minutes Alarm
15 RSVD 0x0 RO
RESERVED
14:8 ALMSEC 0x0 RW
Seconds Alarm
7:0 ALM100 0x0 RW
100ths of a second Alarm
Table 804: ALMUP Register
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
RSVD
ALMWKDY
RSVD ALMMO
RSVD
ALMDATE