RS5C348A RICOH Co.,Ltd., RS5C348A Datasheet - Page 20

• Manufacturer Part Number: RS5C348A
• Description: 4-wire Serial Interface Real-time Clock
• Manufacturer: RICOH Co.,Ltd.

Rx5C348A/B
Rev.2.01
Alarm_D Minute Register (Address Bh)
Alarm_D Hour Register (Address Ch)
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 Mon. to Fri.
01:30 p.m. on Sun.
11:59 p.m.
D7
-
0
0
D7
-
0
0
on Mon. ,Wed., and Fri.
Alarm_D Register (Address B-Ch)
Preset alarm time
12345
Alarm
Example of Alarm Time Setting
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.
*) Default settings: Default value means read / written values when the XSTP bit is set to “1” due to VDD
*
*
*
(Note that any mismatch between current time and preset alarm time specified by the Alarm_D registers
(See "P12
Indefinite
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.
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.
D6
DM40
DM40
D6
-
0
0
Control Register 1 (ADDRESS Eh) (2) /12⋅24: 12-/24-hour Mode Selection Bit")
Indefinite
Indefinite
Day-of-week
Sun.
WW0
D5
DM20
DM20
D5
DH20
DP⋅/A
DH20
DP⋅/A
1
1
1
0
1
0
power-on from 0v or oscillation stopping
Mon.
WW1
1
1
1
1
0
1
Indefinite
Indefinite
DM10
D4
DM10
D4
DH10
DH10
Tue.
WW2
1
1
1
1
0
0
Wed.
WW3
Indefinite
Indefinite
1
1
1
1
0
1
D3
DM8
DM8
D3
DH8
DH8
Th.
WW4
1
1
1
1
0
0
Indefinite
Indefinite
D2
DM4
DM4
D2
DH4
DH4
Fri.
WW5
1
1
1
1
0
1
- 20 -
Sat.
WW6
1
1
1
0
0
0
Indefinite
Indefinite
D1
DM2
DM2
D1
DH2
DH2
12-hour mode
10
hr.
1
0
1
3
2
3
1
hr.
2
1
1
2
1
1
Indefinite
Indefinite
D0
DM1
DM1
D0
DH1
DH1
10
min.
0
3
5
0
3
5
1
min.
0
0
9
0
0
9
(For Writing)
(For Reading)
Default Settings *)
(For Writing)
(For Reading)
Default Settings *)
24-hour mode
10
hr.
0
0
1
1
1
2
1
hr.
0
1
1
2
3
3
10
min.
0
3
5
0
3
5
1
min.
0
0
9
0
0
9