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EKTF6708 Datasheet(PDF) 103 Page - ELAN Microelectronics Corp |
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EKTF6708 Datasheet(HTML) 103 Page - ELAN Microelectronics Corp |
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103 / 158 page  eKTF6708 8-Bit Microcontroller IC Product Specification (V1.2) 03.12.2020 93 (This specification is subject to change without prior notice) TKASW[2:0] Sensing pin (TKA) 000 TK1 001 TK2 010 TK3 011 TK4 100 TK5 101 TK6 110 TK7 111 TK8 Each touch pin will sense (TKCCR+1)*2 periods. During each period, pin’s capacitance is sensed and calculated. Accumulate multiple periods to get the counter data from register (TKAH_TKAL) or (TKBH_TKBL). TK1 TK2 TK3 ~ TK8 TKS period (Cycle+1)*2 1 2 3 4 1 2 3 4 1 User can set the TKCTR register to control the Touch pin sensing frequency. If the TK scan time is less than the touch sensing time, TK Error Interrupt will happen, and the Touch Key Period Error status flag (TKPESF) will be set to 1. Period time = TK initial time + TK scan time = {[(TKCTR+1)*2+1] + [( TKCTR+1 ) * 16]} * 1/FTK |
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