RF5C62 데이터 시트보기 (PDF) - RICOH Co.,Ltd.
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RF5C62 Datasheet PDF : 48 Pages
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RP/RF/RS5C62
2.6 Alarm Register (1-minute, 10-minute, 1-hour, and 10-hour) (BANK1 at “2h to 5h”)
D3
AM8
*
AH8
*
D2
D1
D0
AM4
AM2
AM1
AM40
AM20
AM10
AH4
AH2
AH1
*
AP/A or AH20 AH10
(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”)
* * 1) The bits marked with “ ” are always read as “0” and not intended for write operation.
*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
time).
*3) Alarm minute and hour settings are exemplified in the table below:
Alarm minute
and hour setting
12-hour time scale
10-hour 1-hour 10-minute 1-minute 10-hour
digit
digit
digit
digit
digit
24-hour time scale
1-hour 10-minute 1-minute
digit
digit
digit
0 : 00 a.m.
1
2
0
0
0
0
0
0
1 : 30 a.m.
0
1
3
0
0
1
3
0
11 : 59 a.m.
1
1
5
9
1
1
5
9
0 : 00 p.m.
3
2
0
0
1
2
0
0
1 : 30 p.m.
2
1
3
0
1
3
3
0
11 : 59 p.m.
3
1
5
9
2
3
5
9
*4) 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.
2.7 12/24-hour Time Scale Selection Register (BANK1 at “Ah”)
D3
D2
D1
D0
**1
*
0
0
*
12/24 (For write operation)
0
0
(For read operation) *2
12/24-hour time scale selection bit *3,4
12/24
Function
0
Selects the 12-hour time scale with a.m. and p.m. indications.
1
Selects the 24-hour time scale.
* * 1) The bits marked with “ ” are not intended for write operation.
*2) These bits are intended for only write operation and always read as “0”.
*3) The time digits are indicated in binary-coded decimal (BCD) notation as shown in the table below:
12
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