Datasheet

24
www.ti.com
TSC2000
SBAS257
FIGURE 13. Y-Coordinate Reading Initiated by Host.
Screen
Touch
Issue Interrupt
PENIRQ
Go to Host-Controlled
Conversion
Touch Screen Scan
Y-Coordinate
Host Initiated
Done
No
Reset PENIRQ
Start Clock
No
Is Panel Voltage
Stabilization Done
Turn On Drivers: Y+, Y–
No
Is Data
Averaging Done
No
Yes
Yes
Yes
Are Drivers On
Convert Y-Coordinates
Start Clock
Power Up A/D Converter
Is PSM = 1
Store Y-Coordinates
in Y-Register
Power Down A/D Converter
Turn Off Clock
Issue Data Available
Done
Host Writes A/D
Converter
Control Register