Hi everyone.

I'm quite new to the world of PICs, and I've got a couple of (hopefully
simple) questions about the PIC16C71...


1. When a pin is configured as an analog input, can it still be used as
   a digital output?  Or would you first have to reconfigure it as
   digital I/O?  The reason why I ask, is that it appears that RA1
   can set up as digital I/O only if RA0 is also.

2. If you write a digital 1 or 0 to a pin which is configured as an
   analog input (and has a voltage connected to it), will it cause
   excessive current and damage the PIC?  Or will the digital output
   just be ignored by the PIC?

3. The databook states that an analog input reads as a digital 0.  Does
   this mean it's not a good idea to do a BSF/BCF on PORT_A if you've
   got one or more pins set up as analog inputs?  I guess this kind of
   ties into question #2, since (I think) it would cause 0's to be
   output on all analog inputs.

4. Let's say I've got RA0 & RA1 set up as analog inputs, and RA2-RA4 as
   digital I/O.  What happens if I write to one of the digital outputs
   on PORT_A while an A/D conversion is taking place?  Will it cause an
   incorrect value to be converted?

I hope these questions make some sense.  Any responses will be greatly
appreciated.

Thanks,

--


- Richard Friesen                        Little Timmy took a drink,
 (Richard_Friesen@mindlink.bc.ca)        But now he'll drink no more,
                                         For what he thought was H2O
                                         Was H2SO4
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