STK1000/LCD

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The on board LCD screen let you try out applications that use the LCD interface on AVR32 to drive LCD screens.

STK1000 have an on board color TFT LCD screen. The LCD screen is 3.5" Quarter VGA (QVGA, 320x240 pixels) with 24 bit resolution.

Contents

LCD power system

The LCD screen require a separate power supply. The LCD display require 5V analog voltage supply, Voltage Gate Low (VGL = -8V) and Voltage Gate High (VGH = 18V) to be supplied and sequenced. STK1000 provide these voltages through a MAX1779 DC-DC converter. The LCD screen is lit by 6 white LEDs in series. These are provided with a constant current generated by a constant current source.

Block diagram

The following block diagrams show the power converter and constant current supply. These voltages and signals are available on the header named LCD test points and the PCI style expansion connector.

Image:STK1000LCDVoltages.gif


The LCD voltages are available on the LCD power connector J21 and on the PCI style expansion connector.

VCOM generation

The common plane voltage (VCOM) is generated from the signal LCD_M (M from LCD module) by an inverting amplifier.

Image:STK1000LCDVCOM.gif

Signals LCD_M and LCD_VCOM are available on the LCD power conenctor J21 and on the PCI style expansion connector.

Interfaces

Refer the help files of the daughter board to find out what interfaces are used and which peripheral on the processor are connected to the interface.

Static version created: 2007-03-07
Copyright (c) 2007 Atmel Corporation