PT7C433833 Datasheet, PDF (11/17 Pages) Pericom Semiconductor Corporation – Real-time Clock Module (I2C Bus)

PT7C433833
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
(default)
0
0
0
0
0
W4
W2
W1
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
(default)
0
0
0
M10
M8
M4
M2
M1
0
0
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
Note: Any registered imaginary time should be replaced by correct time, otherwise it will cause the clock counter malfunction.
12-07-0001
PT0321-6 07/04/12
11