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Is there any method to inialize the P0-P17 after poweer on?
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Hello Danny,
Are you using the TCA6416 or the TCA6416A? Use the TCA6416A because the non-A version is NRND.
I am not sure about your question. You really should try and be as specific as possible when posting a question to E2E.
I believe you are asking what the default state of the TCA6416A after it is powered on. This is covered in the datasheet on page 21, see below:
Generally speaking you configure your output ports and polarity registers to the desired state then write to the Configuration register to implement your desired port configuration.
-Francis Houde