7

POWER SUPPLY

LCD Module

VO

VDD(+5V)

R1

R2

VR

VSS

5V Power Input

LCD Module

VO

VDD(+3.3V)

VR

VSS

DC/DC

Converter

R8

-3.3V

3.3V Power Input

LCD Bias

Circuit

LCD Bias

Circuit

R9

R10

A

1

K

2

LED_BACKLIGHT

JP1

JP3

VDD

There are two methods to light up the LED back-light : (Please indicate while ordering.)

(1) Add +4.05V between LED A & K directly. (Default)

(2) Short JP1&JP3 and use current-limit resistor(R9/R10), use the same power (+5V) with the

logic circuit.

Date : 2001/12/11

AMPIRE CO., LTD.

8