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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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WM9713LGEFL/V 데이터시트(PDF) 57 Page - Wolfson Microelectronics plc |
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WM9713LGEFL/V 데이터시트(HTML) 57 Page - Wolfson Microelectronics plc |
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57 / 108 page  Pre-Production WM9713L w PP Rev 3.0 June 2006 57 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 |
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