rs5c338a RICOH Co.,Ltd., rs5c338a Datasheet - Page 17

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

2.4 Day-of-week Counter (at Address 3h)
· The day-of-week counter is incremented by 1 when the day-of-week digits are carried to the day-of-month digits.
· Day-of-week display (incremented in septimal notation):
· Correspondences between days of the week and the day-of-week digits are user-definable (e.g. Sunday = 0, 0, 0)
· The writing of (1, 1, 1) to (W
2.5 Calendar Counters (at Address 4h to 6h)
· The calendar counters are configured to display the calendar digits in BCD format by using the automatic calen-
· Any carry from lower digits with the writing of non-existent calendar data may cause the calendar counters to mal-
2.5-1 Day-of-month Counter (at Address 4h)
2.5-2 Month Counter + Century Bit (at Address 5h)
Indefinite
(W
dar function as follows:
The 19/20 digits cycle between 0 and 1 in reversion from 99 to 00 in the year digits.
function. Therefore, such incorrect writing should be replaced with the writing of existent calendar data.
*
) 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.
19/20
19/20
D7
D7
D7
4
—
—
0
0
The day-of-month digits (D
December; from 1 to 30 for April, June, September, and November; from 1 to 29 for February in leap years;
from 1 to 28 for February in ordinary years.
The day-of-month digits are carried to the month digits in reversion from the last day of the month to 1. The
month digits (MO
The year digits (Y
19/20 digits in reversion from 99 to 00.
0
0
, W
2
, W
1
) = (0, 0, 0) → (0, 0, 1) → ... → (1, 1, 0) → (0, 0, 0)
D6
D6
D6
—
—
—
0
0
0
0
0
0
10
80
Indefinite
to MO
to Y
D
D
D5
D5
D5
—
—
0
0
0
0
20
20
4
1
, W
) range from 00 to 99 (00, 04, 08, ... , 92, and 96 in leap years) and are carried to the
1
20
) range from 1 to 12 and are carried to the year digits in reversion from 12 to 1.
2
, W
to D
Indefinite
Indefinite
MO
MO
1
D4
D4
D
D
D4
) is prohibited except when days of the week are unused.
—
1
0
0
) range from 1 to 31 for January, March, May, July, August, October, and
10
10
10
10
Indefinite
Indefinite
MO
MO
D3
D3
D3
D
D
—
0
0
8
8
8
8
Indefinite
Indefinite
Indefinite
MO
MO
D2
W
W
D2
D2
D
D
4
4
4
4
4
4
Indefinite
Indefinite
Indefinite
MO
MO
D1
D1
D1
W
W
D
D
2
2
2
2
2
2
Indefinite
Indefinite
Indefinite
MO
MO
D0
D0
D0
W
W
D
D
1
1
1
1
1
1
(For writing)
(For reading)
Default settings*
(For writing)
(For reading)
Default settings*
(For writing)
(For reading)
Default settings*
R
×
5C338A
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