PT7C4302 Datasheet, PDF (8/16 Pages) Pericom Semiconductor Corporation – Real-time Clock Module (3-wire Interface)

Data Sheet
PT7C4302
Real-time Clock Module (3-wire Interface)
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
5. 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)
03
Dates
(default)
0
0
D20
D10
D8
D4
D2
D1
0
0
Undefined Undefined Undefined Undefined Undefined Undefined
04
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.
6. Trickle Charger
Addr. Description
D7
D6
D5
D4
D3
D2
D1
D0
8 ^{Trickle charger TCS}
TCS
TCS
TCS
DS
DS
RS
RS
(default)
0
1
0
1
1
1
0
0
a) Trickle Charger Select
Control the selection of the trickle charger.
TCS
Data
Read/
Write
Other patent Disable the trickle charger
1010
Enable the trickle charger
Description
PT0225(11/05)
8
* Default 0101
Ver: 0