Hi,

I have recently noticed that when I set an output port high it is only 2.5V and not 5V. Does anyone know why? I have checked all power connections with 5V going in and pins are setup.

 

I can think of two possibilities:

1) Your processor is not running at all, due to bad configuration bits or bad oscillator circuit maybe.

2) You only THINK that you have set the port bits to output, but have not done all necessary to achieve output high. Maybe still in analogue mode. Post a simple example code and it should be possible to spot any mistake.

 

Do you have any thing connected to the port? If you load the port to much you may see something like this. And to be sure are all VDD and VSS are connected properly.

 

Do you have any thing connected to the port? If you load the port to much you may see something like this. And to be sure are all VDD and VSS are connected properly.

They are Zero Ohms for 16F as far as I know- all connected internally.

 

Its ok, it was a coding error.

 

Its ok, it was a coding error.

So by what magic or incantation did you get a digital output to read neither one nor zero but instead one half?