rs5c338a RICOH Co.,Ltd., rs5c338a Datasheet - Page 10

• Manufacturer Part Number: rs5c338a
• Description: 3-wire Serial Interface Real-time Clock Ics With Voltage Monitoring Function
• Manufacturer: RICOH Co.,Ltd.

10
R
2. Register Settings
2.1 Control Register 1 (at Address Eh)
2.1-1 WALE, DALE
2.1-2 12/24-hour Mode Selection Bit
Setting the 12/24 bit to 0 and 1 specifies the 12-hour mode and the 24-hour mode, respectively.
Table of Time Digit Indications
WALE
WALE
×
*
*
) Default settings: Default value means read/written values when the XSTP bit is set to “1” due to power-on from 0 volts or supply voltage drop.
WALE, DALE
) Setting the 12/24 bit should precede writing time data.
D7
5C338A
0
12/24
24-hour mode
0
1
0
1
DALE
DALE
00
01
02
03
04
05
06
07
08
09
10
11
D6
0
Alarm_W Enable Bit and Alarm_D Enable Bit
12/24-hour Time Display System Selection bit
Disabling the alarm interrupt circuit (under the control of the settings of the
Alarm_W registers and the Alarm_D registers).
Enabling the alarm interrupt circuit (under the control of the settings of the
Alarm_W registers and the Alarm_D registers)
Selecting the 12-hour mode with a.m. and p.m. indications.
Selecting the 24-hour mode
12/24
12/24
D5
0
CLEN2
CLEN2
D4
0
12-hour mode
12 (AM12)
10 (AM10)
11 (AM11)
01 (AM 1)
02 (AM 2)
03 (AM 3)
04 (AM 4)
05 (AM 5)
06 (AM 6)
07 (AM 7)
08 (AM 8)
09 (AM 9)
TEST
TEST
D3
0
Description
Description
CT
CT
D2
0
2
2
CT
CT
D1
0
24-hour mode
1
1
12
13
14
15
16
17
18
19
20
21
22
23
CT
CT
D0
0
0
0
(For writing)
(For reading)
Default settings*
12-hour mode
(Default setting)
32 (PM12)
30 (PM10)
31 (PM11)
21 (PM 1)
22 (PM 2)
23 (PM 3)
24 (PM 4)
25 (PM 5)
26 (PM 6)
27 (PM 7)
28 (PM 8)
29 (PM 9)