Datasheet

Program Description
3-11
Operation
Figure 3−1. Human Interface Screen (Solid Mode)
This screen reflects the touch screen from the TSC2101EVM. The status bar
at the bottom of the screen is divided into four sections and shows the status
of communication between the PC and the EVM. Starting from the left, the first
section shows the status of the connection. If an error in communication
occurs, an error message appears here; otherwise, it looks as shown in
Figure 3−1. The final section, on the right side of the status bar, shows the
number of readings per second being taken from the touch screen.
The touch screen box on this screen is updated when a touch is detected on
the touch screen. As the touch screen is drawn on, the motion on the touch
screen is translated into pixels on the screen. The software takes X and Y, or
X, Y, and Z readings, which are shown at the top of this box. Even though
TSC2101 has five different touch screen scan modes, this EVM allows only
two selections at this tab, either X and Y, or X, Y, and Z. Default is the X, Y, and
Z mode. In X and Y mode, the pixel size is fixed. In the X, Y, and Z mode, as
the touch pressure is increased, the pixel size increases. A lighter touch results
in smaller pixel sizes. Refer to Figure 3−1.
The X and Y, or X, Y, and Z mode is selected by clicking on the option at the
A/D Mode Selection Box. The touch is shown on the screen in solid mode, as
shown in Figure 3−1, or dot mode as shown in Figure 3−2. The line or dot
mode is selected by the corresponding option on the top of the drawing screen.