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CLCD Display and Adaptor Board
ARM DUI 0224F Copyright © 2003-2007 ARM Limited. All rights reserved. C-7
C.2.1 Configuration
The CLCD adaptor board contains factory-installed links that identify the type of
display. The display matching the identification links settings are listed in Table C-1.
The value of the bits CLCDID[4:0] in the SYS_CLCD register can be read from
software to determine the display in use with the board.
C.2.2 LCD power control
The LCD adaptor board accommodates a wide range of LCDs. Displays can require
from 1 to 4 power supplies that can either be turned on/off simultaneously or need to be
switched on/off in a certain order. System control register SYS_CLCD and the CLCD
PrimeCell system register control power switching. The voltage supplies on the board
are:
Vin This is permanently on and is not switched. This provides power to the
board (nominal 12V) for the backlight converter.
1V8 This supply is permanently on. It is generated from 5V.
SWITCHED_FIXED
The supply is generated from the 1.8V, 3.3V or 5V supply. It can be
enabled by PWR3V5VSWITCH in SYS_CLCD or permanently
enabled by link 13.
SWITCHED_CLPWR
This supply is generated from 5V. It can be enabled by the CLPOWER
signal in the CLCD PrimeCell control register or permanently enabled by
link 15.
Table C-1 Displays available with adaptor board
LCD_ID[4:0] Manufacturer
Backlight
inverter
Touchscreen Display
b00000
Sanyo
TM38QV67A02A
TDK CXA-0341 Part of display 3.8 inch QVGA Color TFT
b00001
Sharp
LQ084V1DG21
TDK
CXA-L0612VJL
DynaPro/3M
95643
8.4 inch VGA color TFT
b00010
Epson
L2F50113T00
LED backlight None 2.2 inch 176x220 Color TFT
b01111
No display fitted - - -