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RV5C338A-E2 Datasheet

  • RV5C338A-E2

  • 3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MON...

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R
5C338A
Example of Alarm Time Setting
Day-of-week
Preset alarm time
12-hour mode
24-hour mode
Sun. Mon. Tue. Wed. Thu.
Fri.
Sat.
WW
0
WW
1
WW
2
WW
3
WW
4
WW
5
WW
6
00:00 a.m. on all days
01:30 a.m. on all days
11:59 a.m. on all days
00:00 p.m. on
Mondays to Fridays
01:30 p.m. on Sundays
11:59 p.m. on Mondays,
Wednesdays, and Fridays
1
1
1
0
1
0
1
1
1
1
0
1
1
1
1
1
0
0
1
1
1
1
0
1
1
1
1
1
0
0
1
1
1
1
0
1
1
1
1
0
0
0
10-hour 1-hour 10-min 1-min 10-hour 1-hour 10-min 1-min
1
0
1
3
2
3
2
1
1
2
1
1
0
3
5
0
3
5
0
0
9
0
0
9
0
0
1
1
1
2
0
1
1
2
3
3
0
3
5
0
3
5
0
0
9
0
0
9
Note that the correspondence between WW
0
to WW
6
and the days of the week shown in the above table is only an
example and not mandatory.
2.8 Alarm_D Register (at Address Bh and Ch)
2.8-1 Alarm_D Minute Register (at Address Bh)
D7
鈥?/div>
0
0
D6
DM
40
DM
40
D5
DM
20
DM
20
D4
DM
10
DM
10
D3
DM
8
DM
8
D2
DM
4
DM
4
D1
DM
2
DM
2
D0
DM
1
DM
1
(For writing)
(For reading)
Default settings*
Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite
2.8-2 Alarm_D Hour Register (at Address Ch)
D7
鈥?/div>
0
0
D6
鈥?/div>
0
0
D5
DH
20
,DP/A
DH
20
,DP/A
D4
DH
10
DH
10
D3
DH
8
DH
8
D2
DH
4
DH
4
D1
DH
2
DH
2
D0
DH
1
DH
1
(For writing)
(For reading)
Default settings*
Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite
*
)
Default settings: Default value means read/written values when the XSTP bit is set to 鈥?鈥?due to power-on from 0 volts or supply voltage drop.
路 The D5 bit represents DP/A when the 12-hour mode is selected (0 for a.m. and 1 for p.m.). and DH
20
when the 24-
hour mode is selected (tens in the hour digits).
路 The Alarm_D registers should not have any non-existent alarm time settings. (Note that any mismatch between
current time and preset alarm time specified by the Alarm_D registers may disable the alarm circuit.)
路 When the 12-hour mode is selected, the hour digits read 12 and 32 for 0 a.m. and 0 p.m., respectively (see 鈥?.1-2
12/24: 12-/24-hour Mode Selection Bit鈥?.
20

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