RF5C62 Просмотр технического описания (PDF) - RICOH Co.,Ltd.
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RF5C62 Datasheet PDF : 48 Pages
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RP/RF/RS5C62
3.2 Day-of-the-week Counter (BANK0 at “6h”)
D3
D2
D1
D0
*
W4
W2
W1 (For read and write operations) Day-of-the-week counter
* * 1) The bits marked with “ ” are always read as “0” and not intended for write operation.
*2) The day-of-the-week counter is incremented by 1 in a carry to the 1-day calendar digit.
*3) Days of the week written to the W4, W2, and W1 bits are counted up in septimal notation as shown below :
(000)®(001)® ..... ®(110)®(000)
The correspondence between days of the week and readings of the day-of-the-week counter is user-definable (e.g. Sunday=000)
*4) The W4, W2, and W1 bits must not be all set to 1.
3.3 Calendar Counter (BANK0 at “7h” to “Ch”)
D3
D8
**1
MO8
*
Y8
Y80
D2
D4
*
MO4
*
Y4
Y40
D1
D2
D20
MO2
*
Y2
Y20
D0
D1
D10
MO1
MO10
Y1
Y10
(For read and write operations) 1-day calendar digit (at“7h”)
(For read and write operations) 10-day calendar digit (at“8h”)
(For read and write operations) 1-month calendar digit (at“9h”)
(For read and write operations) 10-month calendar digit (at“Ah”)
(For read and write operations) 1-year calendar digit (at“Bh”)
(For read and write operations) 10-year calendar digit (at“Ch”)
* * 1) The bits marked with “ ” are always read as “0” and not intended for write operation.
*2) The calendar digits are indicated in BCD notation by the automatic calendar function as shown below:
Day digit : Ranges from 1 to 31 (in January, March, May, July, August, October, and December)
Ranges from 1 to 30 (in April, June, September, and November)
Ranges from 1 to 29 (in February in leap years)
Ranges from 1 to 28 (in February in normal years)
Carried to the month digit in transition back to 1.
Month digit : Ranges from 1 to 12 carried to the year digit in transition back to 1.
Year digit : Ranges from 00 to 99 including leap years of 00, 04, 08, - - - - - -, 92, and 96 (when leap year indication is enabled by setting the LYE
bit in the leap year indication register to “0” ).
*3) A carry from any non-existent calendar digit must be avoided because it may cause malfunction in the calendar counter.
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