AR1011-ISLASHSS datasheet(13/70 Pages) MICROCHIP

13 / 70 page

 2009-2012 Microchip Technology Inc.

Preliminary

DS41393B-page 13

AR1000 SERIES RESISTIVE TOUCH SCREEN CONTROLLER

3.4

5-Wire Touch Sensor Interface

Sensor tail pinouts can vary by manufacturer and part

number. Ensure sensor tail pins for one pair of

diagonally related sensor corners are connected to the

controller’s X-/X+ pins and the tail pins for the other pair

of diagonally related corners are connected to the

controller’s Y-/Y+ pins.

The controller’s X-/X+ and Y-/Y+ pin pairs do not need

to connect to a specific sensor axis. The orientation of

controller pins X- and X+ to the two selected diagonal

sensor corners is not important.

Likewise, the orientation of controller pins Y- and Y+ to

the other two selected diagonal sensor corners is not

important. The sensor tail pin connected to its top layer

must be connected to the controller’s 5WSX- pin.

Connections to a 5-wire touch sensor are shown in

Figure 3-3 below.

FIGURE 3-3:

5-WIRE TOUCH SENSOR INTERFACE

Tie unused controller pins SX+, SY-, and SY+ to VSS.

See

“Section 3.8

“ESD

Considerations”

and

Section 3.9 “Noise Considerations” for important

information regarding the capacitance of the controller

schematic hardware.

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