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RV5C338A-E2 Datasheet

  • RV5C338A-E2

  • 3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MON...

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R
脳
5C338A
2.4 Day-of-week Counter (at Address 3h)
D7
鈥?/div>
0
0
D6
鈥?/div>
0
0
D5
鈥?/div>
0
0
D4
鈥?/div>
0
0
D3
鈥?/div>
0
0
D2
W
4
W
4
Indefinite
D1
W
2
W
2
Indefinite
D0
W
1
W
1
Indefinite
(For writing)
(For reading)
Default settings*
*
)
Default settings: Default value means read/written values when the XSTP bit is set to 鈥?鈥?due to power-on from 0 volts or supply voltage drop.
路 The day-of-week counter is incremented by 1 when the day-of-week digits are carried to the day-of-month digits.
路 Day-of-week display (incremented in septimal notation):
(W
4
, W
2
, W
1
) = (0, 0, 0)
鈫?/div>
(0, 0, 1)
鈫?/div>
...
鈫?/div>
(1, 1, 0)
鈫?/div>
(0, 0, 0)
路 Correspondences between days of the week and the day-of-week digits are user-definable (e.g. Sunday = 0, 0, 0)
路 The writing of (1, 1, 1) to (W
4
, W
2
, W
1
) is prohibited except when days of the week are unused.
2.5 Calendar Counters (at Address 4h to 6h)
路 The calendar counters are configured to display the calendar digits in BCD format by using the automatic calen-
dar function as follows:
The day-of-month digits (D
20
to D
1
) range from 1 to 31 for January, March, May, July, August, October, and
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
10
to MO
1
) range from 1 to 12 and are carried to the year digits in reversion from 12 to 1.
The year digits (Y
80
to Y
1
) range from 00 to 99 (00, 04, 08, ... , 92, and 96 in leap years) and are carried to the
19/20 digits in reversion from 99 to 00.
The 19/20 digits cycle between 0 and 1 in reversion from 99 to 00 in the year digits.
路 Any carry from lower digits with the writing of non-existent calendar data may cause the calendar counters to mal-
function. Therefore, such incorrect writing should be replaced with the writing of existent calendar data.
2.5-1 Day-of-month Counter (at Address 4h)
D7
鈥?/div>
0
0
D6
鈥?/div>
0
0
D5
D
20
D
20
Indefinite
D4
D
10
D
10
Indefinite
D3
D
8
D
8
Indefinite
D2
D
4
D
4
Indefinite
D1
D
2
D
2
Indefinite
D0
D
1
D
1
Indefinite
(For writing)
(For reading)
Default settings*
2.5-2 Month Counter + Century Bit (at Address 5h)
D7
19/20
19/20
Indefinite
D6
鈥?/div>
0
0
D5
鈥?/div>
0
0
D4
MO
10
MO
10
Indefinite
D3
MO
8
MO
8
Indefinite
D2
MO
4
MO
4
Indefinite
D1
MO
2
MO
2
Indefinite
D0
MO
1
MO
1
Indefinite
(For writing)
(For reading)
Default settings*
17

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