WM9713LGEFLSLASHV datasheet(57/108 Pages) WOLFSON

Part #	WM9713LGEFL/V

Description	AC 97 Audio Touchpanel CODEC

PDF	108 Pages

Scroll/Zoom	100%

Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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57 / 108 page

Pre-Production

WM9713L

PP Rev 3.0 June 2006

TOUCHPANEL INTERFACE

The WM9713L includes a touchpanel driver and digitiser circuit for use with 4-wire or 5-wire resistive

touchpanels. The following functions are implemented:

X co-ordinate measurement

Y co-ordinate measurement

Pen down detection, with programmable sensitivity

Touch pressure measurement (4-wire touchpanel only)

Auxiliary measurement from COMP1/AUX1 (pin 29), COMP2/AUX2 (pin 30), or

WIPER/AUX4 (pin 12)

The touchpanel digitiser uses a very low power, 12-bit successive approximation type ADC. The

same ADC can also be used for battery and auxiliary measurements (see the “Battery Alarm and

Battery Measurement” and “Auxiliary ADC Inputs” sections).

An on-chip switch matrix connects each touchpanel terminal to the supply voltage TPVDD, to ground

(TPGND), or to the ADC input, as required.

Figure 16 Touchpanel Switch Matrix

WM9713LGEFL/V Datasheet(PDF) 57 Page - Wolfson Microelectronics plc