WM9713L_06 WOLFSON [Wolfson Microelectronics plc], WM9713L_06 Datasheet - Page 57

• Manufacturer Part Number: WM9713L_06
• Description: AC 97 Audio + Touchpanel CODEC
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

Pre-Production
TOUCHPANEL INTERFACE
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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
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
WIPER/AUX4 (pin 12)
PP Rev 3.0 June 2006
WM9713L
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