Greetings,
        ALL PIC14000 have this problem -  all that is available today
are Rev A parts.  The errata sheet is on the web - see:

http://www.microchip.com/10/Datasheet/Errata.htm#86

> I received the errata sheet from the local sales rep...
> You might be able to get it off the web/send mail to microchip.
>
> >Greetings,
> >    Where does one find this errata sheet?  How can you tell the rev of
> >14000 part?
> >
> >
> >> Check out the 14000 errata sheet(PIC14C000 Errata sheet for PIC14C000
> >> Revision A). States that AN1 & AN5 will show up as high if the level shift
> >> network is turned off.
> >>
> >> >I'm trying to use all 8 analogue inputs on a 14000. I find that AN1 and
> >> >AN5 just give overflows (the other 6 inputs are OK), unless I switch on
> >> >the level shift networks. Then they work fine, except for having ~0.5 V
> >> >added!
> >> >
> >> >Is there something obvious I've missed?
> >> >
> >> >
> >> >=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> >> >
> >> >Dr. Simon J. Melhuish
> >> >N.R.A.L., Jodrell Bank.
> >> >http://www.jb.man.ac.uk/~sjm/
> >>
> _____________________________________________________________________________
> Venkat Rangan
> QUALCOMM Incorporated,                                        Phone: (619) 651
-0069
> 6455 Lusk Blvd.                                               Fax:   (619) 651
-1997
> San Diego, CA 92121                            e-mail: vrangan@qualcomm.com
> _____________________________________________________________________________
>