rs5c62 RICOH Co.,Ltd., rs5c62 Datasheet - Page 16

• Manufacturer Part Number: rs5c62
• Description: Real-time Clock
• Manufacturer: RICOH Co.,Ltd.

12
RP/RF/RS5C62
2.6 Alarm Register (1-minute, 10-minute, 1-hour, and 10-hour) (BANK1 at “2h to 5h”)
2.7 12/24-hour Time Scale Selection Register (BANK1 at “Ah”)
and hour setting
Alarm minute
*
*
*
*
*
*
*
AM
AH
D3
1) The bits marked with “
2) When enabling an alarm interrupt, non-existent minute and hour alarm digits must not be left (to prevent mismatching between clock time and alarm
3) Alarm minute and hour settings are exemplified in the table below:
4)
1)
2)
3)
*
11 : 59 a.m.
11 : 59 p.m.
*
*
D3
0
0 : 00 a.m.
1 : 30 a.m.
0 : 00 p.m.
1 : 30 p.m.
*
8
8
1
time).
In the the 12-hour time scale, the hour digits of 12 and 32 indicate 0 o'clock a.m. and 0 o'clock p.m., respectively.
The bits marked with “
These bits are intended for only write operation and always read as “0”.
The time digits are indicated in binary-coded decimal (BCD) notation as shown in the table below:
AM
AM
AH
D2
D2
*
*
0
40
4
4
10-hour
AP/A or AH
digit
AM
1
0
1
3
2
3
AM
*
AH
*
D1
” are always read as “0” and not intended for write operation.
D1
” are not intended for write operation.
*
0
20
2
2
20
12-hour time scale
1-hour
digit
AM
2
1
1
2
1
1
12/24
AH
AM
AH
D0
D0
0
10
10
1
1
10-minute 1-minute
12/24-hour time scale selection bit *
digit
(For read and write operations) 1-minute alarm digit (at“2h”)
(For read and write operations) 10-minute alarm digit (at “3h”)
(For read and write operations) 1-hour alarm digit (at “4h”)
(For read and write operations) 10-hour alarm digit (at“5h”)
(For write operation)
(For read operation)
0
3
5
0
3
5
12/24
0
1
digit
0
0
9
0
0
9
Selects the 12-hour time scale with a.m. and p.m. indications.
Selects the 24-hour time scale.
10-hour
digit
*
2
0
0
1
1
1
2
24-hour time scale
1-hour 10-minute 1-minute
digit
0
1
1
2
3
3
3,4
Function
digit
0
3
5
0
3
5
digit
0
0
9
0
0
9