參數(shù)資料
型號: S-35399A03-J8T2U
元件分類: 時鐘/數(shù)據(jù)恢復(fù)及定時提取
英文描述: 1 TIMER(S), REAL TIME CLOCK, PDSO8
封裝: HALOGEN FREE AND LEAD FREE, SOP-8
文件頁數(shù): 10/53頁
文件大小: 472K
代理商: S-35399A03-J8T2U
2-WIRE REAL-TIME CLOCK
S-35399A03
Rev.2.0_00
Seiko Instruments Inc.
18
8. Alarm expansion register 1 and alarm expansion register 2
The alarm expansion register 1 and 2 are 3-byte registers. They are expansion registers for the INT1 and INT2 registers
which output alarm interrupt. Users are able to set the alarm time; the data of year, month, day. The configuration of
register is expressed by BCD code as well as the data register of year, month, day in the real-time register.
M10
0
A1YE A1ME
B7
B0
D1
D10 D20
0
A1DE
B7
B0
M4
M8
D8
D4
D2
Y1
Y2
Y10 Y20 Y40 Y80
B7
B0
Y4
Y8
Alarm expansion register 1
Alarm expansion register 2
M1
M2
M10
0
A2YE A2ME
B7
B0
D1
D10 D20
0
A2DE
B7
B0
M4
M8
D8
D4
D2
Y1
Y2
Y10 Y20 Y40 Y80
B7
B0
Y4
Y8
M1
M2
Figure 19 Alarm Expansion Register 1 and Alarm Expansion Register 2
To make the year data of alarm expansion register 1 valid, set A1YE to “1”. For the month data, set A1ME to “1”, for the
day data, set A1DE to “1”. Set as well A2ME, A2YE, A2DE in the alarm expansion register 2. Regarding how to set the
data of day of the week, hour, and minute, refer to “(1) Alarm interrupt” in “4. INT1 register and INT2 register”.
Setting example: Setting alarm time “January 31, 2015” in the alarm expansion register 1
Writing to alarm expansion register 1
Year
1
0
1
0
1
0
Month
1
0
*1
1
Day
1
0
1
*1
1
B7
B0
*1.
Don’t care (Both of 0 and 1 are acceptable.)
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