Appendix B: Lcd Interface; General; Display Hardware Design - Xilinx Virtex-4 ML461 User Manual

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LCD Interface
This appendix describes the LCD interface for the Virtex-4 ML461 Development Board.

General

The Virtex-4 ML461 Development Board board has a full graphical LCD display. This
display has been chosen because of its possible use in embedded systems. A character-type
display also can be connected because the graphical LCD has the same interface as the
character-type LCD panels.
A hardware character generator must be designed in order to display characters on the
screen.

Display Hardware Design

The FPGA (I/O functioning at 2.5V) is connected to the graphic LCD display through a set
of voltage-level converting devices. These switches translate the 2.5 I/O voltage to a 3.3V
voltage for the LCD display.
A graphics-based LCD panel from DisplayTech (64128EFCBC-XLP) is used on the Virtex-4
ML461 Development Board. The control for this LCD panel is based on the KS0713
controller from Samsung. The KS0713 is a 65-column, 132-segment driver-controller device
for graphic dot matrix LCD display systems. The chip accepts serial or parallel display
data. The 8-bit parallel interface is compatible with most LCD panel manufacturers. The
serial connection mode is write only.
Extra features added to the interface in addition to the normal parallel signals are:
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The interface also contains the following built-in options for the display and controller:
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Virtex-4 ML461 Development Board User Guide
UG079 (v1.1) September 5, 2007
Intel or Motorola compatible interface
External reset of the chip
External chip select
On-chip oscillator circuitry
On-chip voltage converter (x2, x3, x4, and x5)
A 64-step electronic contrast control function
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Appendix B
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