Hardware Description

 

Table 3-14 Display interface signals (continued)

 

 

Signal

Description

 

 

TSSCLK

Clock to touchscreen controller.

 

 

TSMOSI

Data from touchscreen controller.

 

 

TSMISO

Data from touchscreen controller.

 

 

TSnDAV

Touchscreen controller data available signal.

 

 

TSnPENIRQ

Touchscreen controller pen down interrupt.

 

 

TSnKPADIRQ

Touchscreen controller key pressed interrupt.

 

 

TSnSS

Touchscreen controller chip select.

 

 

Power control

The nLCDIOON, CLPOWER, PWR3V5VSWITCH, VDDNEGSWITCH, and

 

VDDPOSSWITCH signals can be used by the LCD adaptor board to select voltage for the display

 

panel. Links on the board are set at manufacture to specify whether the panel voltages are fixed or

 

programmable.

 

 

LCDID[4:0]

These signals are determined by resistor links on the LCD adaptor board. They indicate the type

 

of display that is attached to the adaptor board.

 

 

LCDMODE[1:0]

These signals select the VGA display resolution. The signals control remapping of the CLD[23:0]

 

data signals to the B[7:0], G[7:0], and R[7:0] signals to the CLCD display and the DAC for the

 

VGA display.

 

 

LCDDATnCOM

This signal indicates to the external controller on the CLCD expansion board whether the current

 

value is data or a command.

 

 

LCDSD0

Serial data in or out for an external controller on the CLCD expansion board.

 

 

LCDSD0OUTnIN

This signal controls the direction of the serial data bus.

 

 

LCDXWR

Write signal to an external controller on the CLCD expansion board.

 

 

LCDXCS

Chip select signal to an external controller on the CLCD expansion board.

 

 

LCDXRD

Read signal to an external controller on the CLCD expansion board.

 

 

VGA_CLK

The VGA clock synchronizes the conversion of the B[7:0], G[7:0], and R[7:0] signals into the

 

RED, GREEN, and BLUE analog signals.

 

 

VGA_HSYNC

The VGA horizontal synchronization signal.

 

 

VGA_VSYNC

The VGA vertical synchronization signal.

 

 

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ARM DUI 0224I

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ARM ARM DUI 0224I manual Display interface signals, Signal Description