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參數(shù)資料
| 型號： | R2025D |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | XO, clock |
| 英文描述： | High precision I2C-Bus Real-Time Clock Module |
| 中文描述： | REAL TIME CLOCK, DSO20 |
| 封裝： | 6.10 X 5 MM, 1.30 MM HEIGHT, SON-22/20 |
| 文件頁數(shù)： | 16/47頁 |
| 文件大?。?/td> | 524K |
| 代理商： | R2025D |
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R2025S/D
Calendar Counter (Address 4-6h)
16
Day-of-month Counter (Address 4h)
D7
D6
-
-
0
0
0
0
Month Counter + Century Bit (Address 5h)
D7
D6
/19
20
-
/19
20
0
Indefinite
0
Year Counter (Address 6h)
D7
D6
Y80
Y40
Y80
Y40
Indefinite
Indefinite
*) Default settings: Default value means read / written values when the PON bit is set to “1” due to VDD
power-on from 0 volts.
* 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.
Oscillation Adjustment Register (Address 7h)
D5
D20
D20
Indefinite
D4
D10
D10
Indefinite
D3
D8
D8
Indefinite
D2
D4
D4
Indefinite
D1
D2
D2
Indefinite
D0
D1
D1
Indefinite
(For Writing)
(For Reading)
Default Settings *)
D5
D4
MO10
MO10
Indefinite
D3
MO8
MO8
Indefinite
D2
MO4
MO4
Indefinite
D1
MO2
MO2
Indefinite
D0
MO1
MO1
Indefinite
-
0
0
(For Writing)
(For Reading)
Default Settings *)
D5
Y20
Y20
Indefinite
D4
Y10
Y10
Indefinite
D3
Y8
Y8
Indefinite
D2
Y4
Y4
Indefinite
D1
Y2
Y2
Indefinite
D0
Y1
Y1
Indefinite
(For Writing)
(For Reading)
Default Settings *)
D7
(0)
0
0
D6
F6
F6
0
D5
F5
F5
0
D4
F4
F4
0
D3
F3
F3
0
D2
F2
F2
0
D1
F1
F1
0
D0
F0
F0
0
(For Writing)
(For Reading)
Default Settings *)
*) Default settings: Default value means read / written values when the PON bit is set to “1” due to VDD
power-on from 0 volts.
(0) bit:
(0) bit should be set to 0
F6 to F0 bits:
* The Oscillation Adjustment Circuit is configured to change time counts of 1 second on the basis of the
settings of the Oscillation Adjustment Register when the second digits read 00, 20, or 40 seconds. Normally,
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