definite port states at power-up

[Acetronics2]

Hello everyone.

I have an application that must absolutely power-up in a definite state. Pins on port b must NOT be in high state. Output and low state is OK, input is ok.



‘(I haven’t included the whole program for sake of clarity)

Just two things to absolutely respect ...

1) The hardware side : system must be in a stable safety state if Processor is out of its socket ( ! ) - @ poweron all pins are inputs ( floating ...)

2) The software side : processor outputs must meet 1) ( no change !!! ) and inputs must be set to the state the sensors and buttons are in 1) situation, so no uncontrolled change could occur.
PORT or LAT Registers have to be set first, THEN TRIS registers ...

That's enough to be perfect !!!

Alain