Eurotech Appliances VIPER / VIPER-LITE PXA255 - Manual (Page 38)

VIPER Technical Manual Detailed hardware description
© 2007 Eurotech Ltd Issue E 38
STN BIAS voltage
The VIPER provides a negative and a positive bias voltage for STN type displays.
The negative and positive bias voltages are set to –22V and +22V respectively.
Pin connections for these can be found in the section
PL3 – LCD connector , page 88 .
Please contact Eurotech Ltd for details of other bias voltages. Contact details are
provided in
Appendix A – Contacting Eurotech , page 101 .
Do not exceed 20mA load current.
VIPER-FPIF1 details
The VIPER-FPIF1 allows easy connection between the VIPER and a variety of TFT or
STN LCD flat panel displays.
The connectors on the following pages are shown in the same orientation as
the picture above.
Connector Function
LK1 TFT clock delay selection
PL1 VIPER LCD cable connector
PL2 Generic LCD connector
PL3
Direct connection to a NEC NL3224BC35-20 5.5inch 320x240 TFT
display
PL4 Connects to backlight inverter
PL5 STN bias voltages
PL2
PL3
PL5
LK1
PL1
PL4