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3. TECHNICAL BRIEF
3.14 Touch Interface
The touch controller is an analog interface circuit for a human interface touch screen device.
All of touch functions are composed of a register-based architecture and are controlled through the
internal register sets by serial interface.
• Operation
As the ISA2000 is a slave device, controls and communication with the ISA2000 is done via a serial
interface under control of the host processor. The touch controller is operated by two operating mode
with selectable, one is the single operating mode and another is the automation operating mode. During
operates as single operating mode, control of the ISA2000 and its functions is accomplished by writing
simple write and read commands of serial interface for getting the selected input ADC conversion, so
user can get the each data among X-position, Y-position and Z-position of ADC conversion per serial
interface write and read commands After receiving INTB signal. While, during operates as automation
operating mode, user can get all of X-position, Y- position and Zposition of ADC conversion per serial
interface write and read commands after finishing the all of ADC conversion.
LGE Internal Use Only
Figure 3-14 Touch Driver Block Diagram
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3. TECHNICAL BRIEF
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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