UR7HCTS2-P840 Datasheet, PDF (9/16 Pages) Semtech Corporation – High-Performance, Low Power PS/2 Touch Screen Controller/Digitizer

SCREENCODER^TM PS2 ABSOLUTE AND RELATIVE POSITIONING MODES OF OPERATION
The ScreenCoder^TM PS2 supports both absolute and relative positioning modes. Details on how to use the IC in
each mode are specified below.cri
ABSOLUTE POSITIONING MODE
To enable the ScreenCoder^TM PS2
to operate in an absolute
positioning mode, a ScreenCoder^TM
PS2 driver, or a driver compliant to
the Semtech’s Extended PS/2
protocol, must be installed.
ScreenCoder^TM PS2 drivers are
available for use under Windows
95, Windows 98, Windows Me, and
Windows NT. Other operating
systems are also supported;
please call Semtech for details.
For Commands and Data Report
organization, please refer to the
Semtech Extended PS/2 Protocol
with Absolute Positioning Mode
Support document.
RELATIVE POSITIONING MODE
In relative positioning mode, the ScreenCoder^TM PS2 operates like a normal
mouse, using a standard system mouse driver.
Button functionality can be achieved as follows: actual switches will act as
left and right buttons, or a tap on the screen will act as a left-button click.
By tapping on the touchscreen, the user can invoke click, double-click, and
click-and-drag functions.
To click, lightly and quickly tap the surface of the touchscreen once.
To double click, rapidly tap on the touchscreen twice.
To click and drag, double-tap rapidly and hold your finger down on the
second tap, then glide to move.
Copyright ©1999-2001 Semtech Corporation
9
DOC7-TS2-P840-DS-106
www.semtech.com