Hello Andy-san, Thank you very much for your reply. I visited the customer to confirm the phenomenon for sure. The phenomenon is as following. - The POR specification of the customer meets data sheet spec. (datasheet P31) - Around over 60℃, PENIRQ has fixed to low level after POR. - PENIRQ has fixed to low level when the temperature is over around 60℃. In this case, TSC2007 is working normally from 25℃ to 60℃. 25℃ working well ---- temperature up ---- get to 60℃ then PENIRQ is fixed to low - Once PENIRQ is fixed to low, the situation is not changed though decreasing temperature till 25℃. Only by POR, TSC2007 can get back to normal situation. - Although under PENIRQ is low fixed, TSC2007 can accept I2C command from Host, that is to say, Read/Write is OK. It's very strange. - The customer made 6 trial boards and the phenomenon has happened on 3 boards. About normal 3 boards, the phenomenon has not happned at 85℃. Could you please consider this phenomenon and advise me anything you notice? And can I ask you 2 more questions about the specification of TSC2007 ? Q1) Data sheet P24, table 2 D3-D2 Bit : "00 Power down between cycles" What is the meaning of "Between Cycles"? What is the condition of "Power Down"? How does TSC2007 come back to normal mode from power down? When TSC2007 come back to normal, "internal reset"(not POR) has happened? Q2) Data sheet P3, Switch drivers drive current 100mS duration/50mA About the duration, 100ms is max? In case of under 50mA , how long is the max duratrion? For example, 25mA ---- 200mSec? Thank you for your support! Regards,
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