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TTP259-ASFN Datasheet(PDF) 69 Page - Tontek Design Technology |
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TTP259-ASFN Datasheet(HTML) 69 Page - Tontek Design Technology |
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69 / 81 page  Preliminary TTP259 TonTouch TM 2015/05/25 Page 69 of 81 Ver: 1.1 16 non-contact inputs touch pad detector The touch pad detector applies the charge sharing conception. The inputs share the pad with IO ports. Built-in charge sharing control, duty detector and de-bounce feature can response the input with varied output refresh rate that dependant on the system request. For power saving concern, auto power off function and wake up de-bounce capability can support a lower average operating current. 12-bit Duty counter & Reload data latch CH0 CH1 : : : : CH14 CH15 Touch pad scan & Timing control Figure: 16 pads Touch pad detector Edge Detector Data Bus TPCMPF Clock Gating Modulation clock selector OSCH/ OSCL Touch pad selector TPCTF CS |
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