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Forum Post: TSC2046E: PENIRQ operation and capacitor of X / Y line

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Part Number: TSC2046E Hi Our customer changed some capacitor on X-/+ and Y-/+ line from 1000pF to 0.01uF. (e.g. a capacitor between X+ and GND) Because to improve ESD tolerance. Then they found the difference before and after changed. Could you advice us for the following question? 1) The time of PENIRQ signal beening high is longer. Why does that capacitor affect to the time? 2)The time only looks affecting to X side. (Please see the below waveform) Why does it affect to only X side? The control bit ; A2=0, A1=0, A0=1, MODE = 0, SFR/DFR=0, PD1,PD0=00 3) These affect is that we don't understand how much time we need to put the mask time. How much should we set the mask time as it described at page 16 on the datasheet? Best Regards, Koji Hamamoto

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