PT6547 datasheet(6/35 Pages) PTC

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PT6547 V1.2

- 6 -

January, 2006

LCD Driver IC with Key Input Function

PT6547

PIN DESCRIPTON

Pin Name

I/O

Description

Pin No.

SG1/P1 to SG8/P8

Segment Driver/General Purpose Output Pins

1 to 8

SG9 to SG73

Segment Driver Output Pins

9 to 73

SG74/COM4

Common/Segment Driver Output Pins

This pin can used as segment output pin in 1/3 duty.

COM1 to COM3

Common Driver Output Pins

77 to 75

SG75/KS1,

SG76/KS2

Key Scan/Segment Driver Output Pins

78, 79

KS3 to KS6

Key Scan Output Pins

80 to 83

KI1 to KI5

Key Scan Input Pins

84 to 88

VDD

Power Supply

VLCD

LCD Driver Power Supply

VLCD1

LCD Drive 2/3 Bias Voltage Power Supply

Must be connected to VLCD2 when a 1/2 bias drive scheme is

used.

VLCD2

LCD Drive 1/3 Bias Voltage Power Supply

Must be connected to VLCD1 when a 1/2 bias drive scheme is

used.

VSS

Ground Pin

TEST

This pin must be connected to ground.

OSC

I/O

Oscillator Input/Output Pin

An oscillator circuit is formed by connecting an external resistor

and capacitor at this pin.

/RES

Reset Input Pin

When this pin is set to “Low”, reset to initial state.

DOUT

Data Output Pin (see Note)

This pin outputs serial data at the falling edge of the shift clock

(starting from the lower bit).

STB

Chip Enable Input Pin

The data input after the STB has fallen is processed as a

command.

When this pin is “High”, CLK is ignored.

CLK

Clock Input Pin

This pin reads serial data at the rising edge and outputs data at

the falling edge.

DIN

Data Input Pin

This pin inputs serial data at the rising edge of the shift clock

(starting from the lower bit).

100

Note: This pin is open-drain output, a pull-up resistor of between 1K and 10KΩ is required.

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