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参数资料
| 型号： | RV5C387A-F |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO10 |
| 封装： | 4 X 2.90 MM, 1.20 MM HEIGHT, SSOP-10 |
| 文件页数： | 10/49页 |
| 文件大小： | 330K |
| 代理商： | RV5C387A-F |
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2.4 Day-of-week Counter (at Address 3h)
D7
D6
D5
D4
D3
D2
D1
D0
—————
W4
W2
W1
00000
W4
W2
W1
0
000
0
Indefinite
(For writing)
(For reading)
Default settings*
*) 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.
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):
(W4, W2, W1) = (0, 0, 0)
→ (0, 0, 1) → ... → (1, 1, 0) → (0, 0, 0)
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 (W4, W2, W1) is prohibited except when days of the week are unused.
2.5 Calendar Counters (at Addresses 4h to 6h)
The calendar counters are configured to display the calendar digits in BCD format by using the automatic
calendar function as follows:
The day-of-month digits (D20 to D1) 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 (MO10 to MO1) range from 1 to 12 and are carried to the year digits in reversion from 12 to 1.
The year digits (Y80 to Y1) 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.
Any carry from lower digits with the writing of non-existent calendar data may cause the calendar counters to
malfunction. 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
D6
D5
D4
D3
D2
D1
D0
——
D20
D10
D8
D4
D2
D1
00
D20
D10
D8
D4
D2
D1
00
Indefinite
(For writing)
(For reading)
Default settings*
2.5-2 Month Counter + Century Bit (at Address 5h)
D7
D6
D5
D4
D3
D2
D1
D0
19/20
—
MO10
MO8
MO4
MO2
MO1
19/20
0
MO10
MO8
MO4
MO2
MO1
Indefinite
0
Indefinite
(For writing)
(For reading)
Default settings*
RV5C387A
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