RS5C313 RICOH Co.,Ltd., RS5C313 Datasheet - Page 12

• Manufacturer Part Number: RS5C313
• Description: Ultra-compact Real-time Clock Ic
• Manufacturer: RICOH Co.,Ltd.

12
RS5C313
3. Counters
3.1 Clock Counter (at 0h to 5h)
3.2 Day-of-the-week Counter (at 6h)
1) The “
2) Any carry to 1-second digits from the second counter is disabled when the WTEN bit (of the control register) is set to 0.
3) Time digit display ( BCD code):
1) The “
2) Day-of-the-week digits are incremented by 1 when carried to 1-day digits.
3) Day-of-the-week digit display (incremented in septimal notation):
4) The (W4W2W1) should not be set to (111).
M
D3
D3
H
S
4) Any registered imaginary time should be replaced with actual time as carrying to such registered imaginary time digits from
*
*
*
*
8
8
8
Second digits: Range from 00 to 59 and carried to minute digits when incremented from 59 to 00.
Minute digits: Range from 00 to 59 and carried to hour digits when incremented from 59 to 00.
Hour digits: Range as shown in the section on the 12/24 bit and carried to day and day-of-the-week.
digits when incremented from 11 p.m. to 12 a.m. or 23 to 00.
The relation between days of the week and day-of-the-week digits is user changeable (e.g. Sunday=000).
(W4W2W1)=(000)→ (001)→ - - - - - - → (110) → (000)
lower-order ones cause the clock counter to malfunction.
*
*
” mark in the above table indicates data which are set to 0 for read cycle and not set for write cycle.
” mark in the above table indicates data which are set to 0 for read cycle and not set for write cycle.
M
S
M
W
D2
D2
H
S
*
40
4
40
4
4
4
P/A or H
M
M
W
D1
S
D1
H
S
20
2
20
2
2
2
20
M
H
D0
S
M
D0
W
H
S
10
10
1
10
1
1
1
( read and write cycle) 1-second time digit (at 0h)
(read and write cycle) 10-second time digit (at 1h)
(read and write cycle) 1-minute time digit (at 2h)
(read and write cycle) 10-minute time digit (at 3h)
(read and write cycle) 1-hour time digit
(read and write cycle) 10-hour time digit
( read and write cycle) Day-of-the-week counter
(at 4h)
(at 5h)