RX5C348A Datasheet, PDF (20/45 Pages) RICOH electronics devices division – 4-WIRE SERIAL INTERFACE

Rx5C348A/B
Example of Alarm Time Setting
Alarm
Day-of-week
12-hour mode
24-hour mode
Preset alarm time
Sun. Mon. Tue. Wed. Th. Fri. Sat. 10 1 10 1 10 1 10 1
hr. hr. min. min. hr. hr. min. min.
WW0 WW1 WW2 WW3 WW4 WW5 WW6
00:00 a.m. on all days
1
1
1
1
1
1
1
1 20 0 00 0 0
01:30 a.m. on all days
1
1
1
1
1
1
1
0 13 0 01 3 0
11:59 a.m. on all days
1
1
1
1
1
1
1
1 15 9 11 5 9
00:00 p.m. on Mon. to Fri. 0
1
1
1
1
1
0
3 20 0 12 0 0
01:30 p.m. on Sun.
1
0
0
0
0
0
0
2 13 0 13 3 0
11:59 p.m.
0
1
0
1
0
1
0
3 15 9 23 5 9
on Mon. ,Wed., and Fri.
Note that the correspondence between WW0 to WW6 and the days of the week shown in the above table is
only an example and not mandatory.
Alarm_D Register (Address B-Ch)
Alarm_D Minute Register (Address Bh)
D7
D6
D5
D4
-
DM40 DM20 DM10
0
DM40 DM20 DM10
0
Indefinite Indefinite Indefinite
D3
DM8
DM8
Indefinite
D2
DM4
DM4
Indefinite
D1
DM2
DM2
Indefinite
D0
DM1
DM1
Indefinite
(For Writing)
(For Reading)
Default Settings *)
Alarm_D Hour Register (Address Ch)
D7
D6
D5
D4
D3
D2
D1
D0
-
-
DH20 DH10 DH8
DH4
DH2
DH1
(For Writing)
DP⋅/A
0
0
DH20 DH10 DH8
DH4
DH2
DH1
(For Reading)
DP⋅/A
0
0
Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite
Default Settings *)
*) Default settings: Default value means read / written values when the XSTP bit is set to “1” due to VDD
power-on from 0v or oscillation stopping
*
The D5 bit represents DP/A when the 12-hour mode is selected (0 for a.m. and 1 for p.m.) and DH20
when the 24-hour mode is selected (tens in the hour digits).
*
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 interrupt circuit.)
*
When the 12-hour mode is selected, the hour digits read 12 and 32 for 0a.m. and 0p.m., respectively.
(See "P12 Control Register 1 (ADDRESS Eh) (2) /12⋅24: 12-/24-hour Mode Selection Bit")
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Rev.2.01
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