ISD91200 Series Technical Reference Manual
Release Date: Sep 16, 2019
- 213 -
Revision 2.4
RTC Calendar Alarm Register (RTC_CALM)
Register
Offset
R/W
Description
Reset Value
RTC_CALM
0x020 R/W
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
Table 5-86 RTC Calendar Alarm Register (RTC_CALM, address 0x4000_8020).
Bits
Description
[31:24]
Reserved
Reserved.
[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.
[12]
TENMON
10-Month Calendar Digit of Alarm Setting (0~1)
[11:8]
MON
1-Month Calendar Digit of Alarm Setting (0~9)
[7]
Reserved
Reserved.
[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_TIME is a BCD digit counter and RTC will not check validity loaded data, valid range is listed in the parenthesis.
2.
This register can be read back after the RTC unit is active.