ARM ARM DUI 0224I manual Configuration, LCD power control, Tdk, CXA-L0612VJL

Models: ARM DUI 0224I

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CLCD Display and Adaptor Board

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.

Table C-1 Displays available with adaptor board

LCD_ID[4:0]

Manufacturer

Backlight

Touchscreen

Display

inverter

 

 

 

 

 

 

 

 

 

b00000

Sanyo

TDK CXA-0341

Part of display

3.8 inch QVGA Color TFT

 

TM38QV67A02A

 

 

 

 

 

 

 

 

b00001

Sharp

TDK

DynaPro/3M

8.4 inch VGA color TFT

 

LQ084V1DG21

CXA-L0612VJL

95643

 

 

 

 

 

 

b00010

Epson

LED backlight

None

2.2 inch 176x220 Color TFT

 

L2F50113T00

 

 

 

 

 

 

 

 

b01111

No display fitted

-

-

-

 

 

 

 

 

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.

ARM DUI 0224I

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

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Page 325
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ARM ARM DUI 0224I manual Configuration, LCD power control, Tdk, CXA-L0612VJL