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PT7C4337 View Datasheet(PDF) - Unspecified

Part Name
Description
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PT7C4337 Datasheet PDF : 25 Pages
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Data Sheet
PT7C4337
Real-time Clock Module (I2C Bus)
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Days of the week Counter
The day counter is a divide-by-7 counter that counts from 01 to 07 and up 07 before starting again from 01. Values that
correspond to the day of week are user defined but must be sequential (i.e., if 1 equals Sunday, then 2 equals Monday, and so on).
Illogical time and date entries result in undefined operation.
Addr.
Description
D7
D6
D5
D4
D3
D2
D1
D0
(hex)
03 Days of the week
0
0
0
0
0
W4
W2
W1
(default)
0
0
0
0
0 Undefined Undefined Undefined
Calendar Counter
The data format is BCD format.
Day digits: Range from 1 to 31 (for January, March, May, July, August, October and December).
Range from 1 to 30 (for April, June, September and November).
Range from 1 to 29 (for February in leap years).
Range from 1 to 28 (for February in ordinary years).
Carried to month digits when cycled to 1.
Month digits: Range from 1 to 12 and carried to year digits when cycled to 1.
Year digits: Range from 00 to 99 and 00, 04, 08, … , 92 and 96 are counted as leap years.
Addr.
Description
D7
D6
D5
D4
D3
D2
D1
D0
(hex)
04
Dates
(default)
0
0
D20
D10
D8
D4
D2
D1
0
0
Undefined Undefined Undefined Undefined Undefined Undefined
05
Months
Century*1
0
(default)
Undefined
0
0
M10
M8
M4
M2
M1
0
Undefined Undefined Undefined Undefined Undefined
06
Years
Y80
Y40
Y20
Y10
Y8
Y4
Y2
Y1
(default)
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined
*1: The century bit is toggled when the years register overflows from 99 to 00.
PT0205(02/07)
10
Ver: 1
 

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