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RS5C372A-E2-F Datasheet(PDF) 27 Page - RICOH electronics devices division

Part No. RS5C372A-E2-F
Description  I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
Download  57 Pages
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Manufacturer  RICOH [RICOH electronics devices division]
Direct Link  http://www.ricoh.com
Logo RICOH - RICOH electronics devices division

RS5C372A-E2-F Datasheet(HTML) 27 Page - RICOH electronics devices division

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RS5C372A/B
26
2.7-6 Alarm_B day-of-the-week register (internal address Dh)
D7
D6
D5
D4
D3
D2
D1
D0
BW6
BW5
BW4
BW3
BW2
BW1
BW0
(For write operation)
0
BW6
BW5
BW4
BW3
BW2
BW1
BW0
(For read operation)
0
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Default
)The default means read value when XSTP bit is set to “1” by starting up from 0V, or supply voltage drop, etc.
Alarm_A, Alarm_B hour register D5 is set to 0 for AM and 1 for PM in the 12-hour display system at AP/ A .
The register D5 indicates 10 digit of hour digit in 24-hour display system at AH20.
To activate alarm operation, any imaginary alarm time setting should not be left to avoid unmatching.
In hour digit display midnight is set to 12, noon is set to 32 in 12-hour display system. (See section 2.2-1)
AW
0
to AW6 correspond to the day-of-the-week counter (W4, W2, W1) being set at (0, 0, 0) to (1, 1, 0).
No alarm pulses are output when all of AW
0
to AW6 are set to “0”.
Example of Alarm Time Settings
Alarm Time Settings
Day-of-the-week
12-hour system
24-hour system
Sun.
AW0
Mon.
AW1
Tue.
AW2
Wed.
AW3
Thu.
AW4
Fri.
AW5
Sat.
AW6
10-hour 1-hour 10-min
1-min 10-hour 1-hour 10-min
1-min
00:00 AM every day
1
1
1
1
1
1
1
1
2
0
0
0
0
0
0
01:30 AM every day
1
1
1
1
1
1
1
0
1
3
0
0
1
3
0
11:59 AM every day
1
1
1
1
1
1
1
1
1
5
9
1
1
5
9
00:00 PM on
Monday through Friday
0
1
1
1
1
1
0
3
2
0
0
1
2
0
0
01:30 PM on Sunday
1
0
0
0
0
0
0
2
1
3
0
1
3
3
0
11:59 PM on Monday,
Wednesday, and Friday
0
1
0
1
0
1
0
3
1
5
9
2
3
5
9
Designation of days of the week and AW0 to AW6 in the above table is an example.


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