> Are we speaking of the same chip? The PIC16F877 doesn't have an ANSEL
> SFR, it has the ADCON1 register to control analog pins with only four
> bits to control the mode of all analog inputs.
>
> The inputs are indeed grouped and you cannot have some ANx configured as
> digital if ANz is analog with x < z, except for AN2 and AN3.
>
> Isaac

Hmmm, from section 9.2.6 16f887 Data Sheet

BANKSEL ANSEL ;
BSF ANSEL,0 ;Set RA0 to analog
BANKSEL ADCON0

>From the SFR function table
ANSEL 188h
ANSELH 189h

It seems the ADCON SFR determine which channel you wish to do
conversion on, ie a MUX type setup.
--=20
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