Datasheet

23
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TSC2000
SBAS257
FIGURE 12. X-Coordinate Reading Initiated by Host.
Screen
Touch
Issue Interrupt
PENIRQ
Go to Host-Controlled
Conversion
Touch Screen Scan
X-Coordinate
Host Initiated
Done
No
Reset PENIRQ
No
Yes
Are Drivers On
Start Clock
No
Yes
Is Panel Voltage
Stabilization Done
Turn On Drivers: X+, X–
Start Clock
Power Up A/D Converter
Is PSM = 1
Convert X-Coordinates
No
Yes
Is Data
Averaging Done
Store X-Coordinates
in X-Register
Power Down A/D Converter
Turn Off Clock
Issue Data Available
Done
Host Writes A/D
Converter
Control Register