ISD94100 Series Technical Reference Manual
Sep 9, 2019
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Rev1.09
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RTC Calendar Alarm Register (RTC_CALM)
Register
Offset
R/W Description
Reset Value
RTC_CALM
0x20
R/W RTC Calendar Alarm Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
TENYEAR
YEAR
15
14
13
12
11
10
9
8
Reserved
TENMON
MON
7
6
5
4
3
2
1
0
Reserved
TENDAY
DAY
Bits
Description
[31:24]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[23:20]
TENYEAR
10-Year Calendar Digit of Alarm Setting (0~9)
[19:16]
YEAR
1-Year Calendar Digit of Alarm Setting (0~9)
[15:13]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[12]
TENMON
10-Month Calendar Digit of Alarm Setting (0~1)
[11:8]
MON
1-Month Calendar Digit of Alarm Setting (0~9)
[7:6]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[5:4]
TENDAY
10-Day Calendar Digit of Alarm Setting (0~3)
[3:0]
DAY
1-Day Calendar Digit of Alarm Setting (0~9)
Note:
1.
RTC_CALM 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.