ISD94100 Series Technical Reference Manual
Sep 9, 2019
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Rev1.09
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RTC Time Alarm Register (RTC_TALM)
Register
Offset
R/W Description
Reset Value
RTC_TALM
0x1C
R/W RTC Time Alarm Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
TENHR
HR
15
14
13
12
11
10
9
8
Reserved
TENMIN
MIN
7
6
5
4
3
2
1
0
Reserved
TENSEC
SEC
Bits
Description
[31:22]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[21:20]
TENHR
10-Hour Time Digit of Alarm Setting (0~2)
When RTC runs as 12-hour time scale mode, RTC_TIME[21] (the high bit of TENHR[1:0])
means AM/PM indication (If RTC_TIME[21] is 1, it indicates PM time message.)
[19:16]
HR
1-Hour Time Digit of Alarm Setting (0~9)
[15]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[14:12]
TENMIN
10-Min Time Digit of Alarm Setting (0~5)
[11:8]
MIN
1-Min Time Digit of Alarm Setting (0~9)
[7]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[6:4]
TENSEC
10-Sec Time Digit of Alarm Setting (0~5)
[3:0]
SEC
1-Sec Time Digit of Alarm Setting (0~9)
Note:
1.
RTC_TALM is a BCD digit counter.
2.
The reasonable value range is listed in the parenthesis.
3.
This register can be read back and written after the RTC register access enable bit RWENF (RTC_RWEN[16]) is active.