> Am I reading the PIC 18F4520 docs correctly that you can only
> assign analog inputs in ascending order?

Some of what I wrote previously is not correct. A couple of points -

In your example, any pins below AN5 that are set as digital I/O do
not need changing to analogue inputs, so you can leave TRISA as
you need it. However, if AN5 is selected as a digital I/O then you
might get a problem if it has an analogue voltage on it

IOW, it's OK to have digital signals on a pin configured as an
analogue input or potential analogue input but it's not always OK to
have analogue voltage on a pin configured as a digital I/O. A series
current-limiting should prevent excessive power consumption

In that case, if you want to use AN5 as the analogue input, set
ADCON1 <PCFG3:PCFG0> to 1001, TRISA <5> = 1 and
ADCON0 <CH3:CHS0> to 0101

Sorry for the mistake, was kind of thinking of something else

wbr
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