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TCA9539-Q1: What is the original setting means?

Frank QIN
Genius 10310 points

Part Number: TCA9539-Q1

Hi Team,

We are kind of confused on this words in datasheet. 'resetting achieved when the data on port changed to the original setting'. What does the original setting means? the output port default setting or our configuration? And is it means data changed on the port we are reading or any of the port changed back to original?

I suppose this port shouldn't be reset before we read the data on this port right?

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Regards,

Frank