NJU6543 Ver la hoja de datos (PDF) - Japan Radio Corporation

Número de pieza

componentes Descripción

Fabricante

NJU6543

1/2 1/3 1/4 Duty LCD Driver

Japan Radio Corporation  

NJU6543 Preliminary

! FUNCTION DESCRIPTION

(1) Block Function

• Oscillator

The oscillator includes an external capacitor and an resistor.

When use external clock, input the clock signal to OSC.

It generates clock signal for LCD driving.

• Decoder

Input serial data is decoded and sent to the appropriate block.

• Command Register

Command data is written to this 8 bits command register to control NJU6543 operation.

• Display Data Register

Data is written to this 8 bits register as display data.

• Latch Circuit

Data stored in display data register is assigned to the corresponding SEG/port.

• Segment Driver/General Purpose Ports

Basing on display data, segment drivers output LCD SEG driving signal.

And, SEG125/P1 ~ SEG128/P4 terminals can be selected as segment driver output or general-purpose ports

by instruction.

• Common Driver

Common drivers output LCD COM driving signal.

• Power On Reset

When power is on, NJU6543 is automatically initialized. And if RSTb=”L”, NJU6543 is reset too.

• Electrical Variable Resistance (E.V.R.)

The Electrical Variable Resistance adjusts LCD Driving Voltage from V1 to V3.

-4-

Ver.2008-11-28

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