ARM ARM DUI 0224I manual Switchedfixed Clpower Switchedvddpos, Switchedvddneg, Fixedswitch Invio

Models: ARM DUI 0224I

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CLCD Display and Adaptor Board

Table C-2 shows the power configuration for the three displays. For additional information on configuring the CLCD displays, see the selftest code provided on the CD.

Table C-2 Power configuration

Voltage control

Epson 2.2

Sanyo 3.8

Sharp 8.4

 

 

 

 

Buffer IO

SWITCHED_FIXED

CLPOWER

CLPOWER

 

 

 

 

SWITCHED_VDD_POS

Software control

15V

Software control

 

 

 

 

SWITCHED_VDD_NEG

–10V

–10V

–10V

 

 

 

 

CLPOWER

2.85V

3.3V

3.3V

 

 

 

 

FIXED_SWITCH

1.8V

5V

5V

 

 

 

 

INV_IO

5V

3.3V

5V

 

 

 

 

Buffer enabled (software

Always on

Always on

Set from CLPOWER

control)

 

 

register in ARM926EJ-S

 

 

 

PXP Development Chip

 

 

 

 

Caution

The links for power control are set during manufacture. Do not modify the links unless you are producing a new custom display board.

Use connector J4 to supply power to an inverter for a backlight. The backlight pins VIN are provide a nominal 12V supply. The backlight inverter must consume less than 5W. The I/O voltage level INV_IO is also present on J4. INV_IO can be link selected to be 5V or 3.3V.

In addition to voltage and ground pins, the connector also supplies the brightness adjustment voltage (0 to INV_IO voltage). The brightness is adjusted by a variable resistor, VR4, located near J4.

ARM DUI 0224I

Copyright © 2003-2010 ARM Limited. All rights reserved.

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Page 327
Image 327
ARM ARM DUI 0224I manual Switchedfixed Clpower Switchedvddpos, Switchedvddneg, Fixedswitch Invio