Hi you Atmel types:

Have an application we have to convert to a PIC in the very near future,
and am trying to figure out how the circuit we have been given is working.

Two Questions:
Port 3, Pin 6, setup for input--does it have an internal pull up resistor,
and if so, what is the value (approximately)?

Port #, Pin 7, setup for output--is this an open collector/drain type
driver? Pin has a pull up to 3.0 volts for level shifting from the 4.5V
rail--and this is the only way I can figure that it would work.

Thanks,
Kelly


William K. Borsum, P.E. -- OEM Dataloggers and Instrumentation Systems
<borsum@dascor.com> & <www.dascor.com>San Diego, California, USA