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PT0225(11/05)

Ver: 0

8

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.

(hex)

Description

D7

D6

D5

D4

D3

D2

D1

D0

Dates

0

0

D20

D10

D8

D4

D2

D1

03

(default)

0

0

Undefined Undefined Undefined Undefined Undefined Undefined

Months

0

0

0

M10

M8

M4

M2

M1

04

(default)

0

0

0

Undefined Undefined Undefined Undefined Undefined

Years

Y80

Y40

Y20

Y10

Y8

Y4

Y2

Y1

06

(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

Trickle charger

TCS

TCS

TCS

TCS

DS

DS

RS

RS

8

(default)

0

1

0

1

1

1

0

0

a)

Trickle Charger Select

Control the selection of the trickle charger.

TCS

Data

Description

Other patent

Disable the trickle charger

* Default 0101

Read/

Write

1010

Enable the trickle charger