ARM ARM DUI 0224I manual Sysclcd register

Models: ARM DUI 0224I

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Programmer’s Reference

 

 

 

Figure 4-14 SYS_CLCD

 

 

 

Table 4-14 SYS_CLCD register

 

 

 

Bits

Access

Description

 

 

 

[31:14]

-

Reserved. Use read-modify-write to preserve value.

 

 

 

[13]

Read

TSnDAV status, LOW indicates that data is available for reading from the touchscreen.

 

 

 

[12:8]

Read

CLCDID[4:0], returns the setting of the ID links on the CLCD adaptor board

 

 

Value Display

 

 

0

320x240 QVGA

 

 

1

640x480 VGA

 

 

2

220x176 QCIF

 

 

3-31

Reserved

 

 

 

[7]

Read/write

SSP expansion chip select. If HIGH, the chip select (SSPnCS) on the SSP expansion

 

 

connector is active. SSPCS is inverted to SSPnCS at the FPGA pin.

 

 

See Synchronous Serial Port, SSP on page 3-84.

 

 

 

[6]

Read/write

Touchscreen enable (TSnSS) to controller on CLCD adaptor board

 

 

 

[5]

Read/write

VDDNEGSWITCHa, enable NEG voltage on the CLCD adaptor board

[4]

Read/write

PWR3V5VSWITCHa, enable FIXED voltage on the CLCD adaptor board

[3]

Read/write

VDDPOSSWITCHa, enable POS voltage on the CLCD adaptor board

[2]

Read/write

LCDIOONa, enable the RGB signal buffers on CLCD adaptor board

[1:0]

Read/write

LCD Mode [1:0], controls mapping of video memory to RGB signals. See Display

 

 

resolutions and display memory organization on page 4-48.

Bit 1 Bit 0 Display mode

0 0 8:8:8

0 1 5:5:5:1

10 5:6:5, red LSB

11 5:6:5, blue LSB

a. The voltage control selection in the SYS_CLCD register might be overridden by links on the CLCD adaptor board.

ARM DUI 0224I

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

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Page 199
Image 199
ARM ARM DUI 0224I manual Sysclcd register