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RV5C348B Datasheet

  • RV5C348B

  • 4-WIRE SERIAL INTERFACE

  • 1293.10KB

  • 45頁

  • RICOH

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Rx5C348A/B
Time Counter (Address 0-2h)
Second Counter (Address 0h)
D7
D6
D5
-
S40
S20
0
S40
S20
Indefinite
Indefinite
0
Minute Counter (Address 1h)
D7
D6
D5
-
M40
M20
0
M40
M20
Indefinite
Indefinite
0
D4
S10
S10
Indefinite
D3
S8
S8
Indefinite
D2
S4
S4
Indefinite
D1
S2
S2
Indefinite
D0
S1
S1
Indefinite
(For Writing)
(For Reading)
Default Settings *)
D4
M10
M10
Indefinite
D3
M8
M8
Indefinite
D2
M4
M4
Indefinite
D1
M2
M2
Indefinite
D0
M1
M1
Indefinite
(For Writing)
(For Reading)
Default Settings *)
Hour Counter (Address 2h)
D7
D6
D5
D4
D3
D2
D1
D0
-
-
H10
H8
H4
H2
H1
(For Writing)
P鈰?A
or H20
H10
H8
H4
H2
H1
(For Reading)
0
0
P鈰?A
or H20
Indefinite
Indefinite
Indefinite
Indefinite
Indefinite
Indefinite
Default Settings *)
0
0
*) Default settings: Default value means read / written values when the XSTP bit is set to 鈥?鈥?due to VDD
power-on from 0v or oscillation stopping
*
Time digit display (BCD format) as follows:
The second digits range from 00 to 59 and are carried to the minute digit in transition from 59 to 00.
The minute digits range from 00 to 59 and are carried to the hour digits in transition from 59 to 00.
The hour digits range as shown in "P12 Control Register 1 (ADDRESS Eh) (2) /12鈰?4: /12-24-hour
Mode Selection Bit" and are carried to the day-of-month and day-of-week digits in transition from
PM11 to AM12 or from 23 to 00.
Any writing to the second counter resets divider units of less than 1 second.
Any carry from lower digits with the writing of non-existent time may cause the time counters to
malfunction. Therefore, such incorrect writing should be replaced with the writing of existent time
data.
*
*
Day-of-week Counter (Address 3h)
D7
D6
D5
D4
D3
D2
D1
D0
-
-
-
-
-
W4
W2
W1
(For Writing)
0
0
0
0
0
W4
W2
W1
(For Reading)
Indefinite
Indefinite
Indefinite
Default Settings *)
0
0
0
0
0
*) Default settings: Default value means read / written values when the XSTP bit is set to 鈥?鈥?due to VDD
power-on from 0v or oscillation stopping
*
*
*
*
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)
鈫?/div>
(0, 0, 1)鈫掆€︹啋(1, 1, 0)
鈫?/div>
(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.
12345
Rev.2.01
- 17 -

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