NCR NCR7454 manual Touch Screen Controller, Processor Board Connectors

Chapter 1: Product Overview 1-15

Touch Screen Controller

The MicroTouch® “Excalibur” chip is used to interface the touch panel. This controller supports MicroTouch capacitive panels.

In order to save an RS-232 port, the touch data is delivered to the system through the mouse interface. This requires a mouse-aware touch device driver for the appropriate OS.

When the system is operating in the dimmed display mode, touch activity can restore full brightness if instructed by software to do so. When system is in low power mode, touch activity can generate the mouse port interrupt (IRQ12).

The Summa POS Motherboard supports the following touch screen LCDs;

•Sharp TFT LCD/capacitive touch screen (F002)

•Sharp TFT LCD/resistive touch screen (F004)\

•15-inch LG TFT LCD/capacitive touch screen (F008)

Processor Board Connectors

All connectors are either keyed or impossible to plug incorrectly due to mechanical design of the product.

External Connectors	Internal Connectors
VGA CRT RGB 15-pin D Shell	LCD
Ethernet RJ45	Back light Inverter
Dual USB Type A	Integrated Speaker Module
External Stereo speaker	MSR
(3.5mm jack)
Power supply	Touch screen (PS/2)
RS-232 9-pin D shell (two, one
with +12 V power option)
PS/2 Keyboard	Motion Sensor / Power Indicator
Customer Display	PCI Expansion header