7
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
JP2
R9
R10
JP4
A
K
1
2
2
2
3
1
1
LED_A (Pin 15)
LED_K (Pin 16)
LED_BACKLIGHT
JP3
JP5
3
There are four methods to light up the LED back-light : (Please indicate while ordering.)
(1) Built-in current-limit resistor(R9/R10). Add +5V between Pin15&16. (Default)
(2) Add +4.05V between LED A & K directly.
(3) Short JP2 and add +4.05V between Pin15&16.
(4) Built-in current-limit resistor(R9/R10) and short JP1&JP3. Use the same power (+5V) with
the logic circuit.
LCM
Using EL Back-light
EL Back-light
EL1
AC110V(400Hz)
EL2
Date : 2001/12/12
AMPIRE CO., LTD.
9
ZETTLER [ ZETTLER ELECTRONICS ]
