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POWER SUPPLY
LCD Module
VDD(+5V)
VDD(+3.3V)
LCD Bias
Circuit
LCD Bias
Circuit
VO
R1
VR
VO
-3.3V
DC/DC
Converter
R8
VR
VSS
LCD Module
R2
VSS
5V Power Input
3.3V Power Input
JP1
VDD
R9
R10
A
K
1
2
LED_BACKLIGHT
JP3
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.
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