Hey,

I asked about some 16f84's at a shop a bit ago and they told me they were no
longer in production but a 16f84a version is available. I haven't had time
to properly look through the 16f84a's data sheets yet but want to know the
main differences. The only difference I know is that a 20MHz version is
available, where I believe a 10MHz was the max for the non A one.

One main issue though, Is it exactly the same to write the program to it? (I
use my own software to program it)

Thanks again.
Regards,

David Stubbs

WEB: www.nti-uk.com
TEL UK: 07968 397782

  -----Original Message-----
  From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of James Paul
  Sent: 29 June 2001 9:48 PM
  To: PICLIST@MITVMA.MIT.EDU
  Subject: Re: [PIC]: 12C67X examples


        Mike,

        Just a heads up. On the 67X parts, to get any I/O to work, make
        sure you change the pins you are outputting on to digital.
        On powerup, they all default to analog inputs.


        Regards,

        Jim



        On Fri, 29 June 2001, "Montaigne, Mike - NRC" wrote:

        >
        > I have some limited experience with the 16F84 but need to do a
project with
        > the 12C67X chip and I am trying to find some simple examples of
code to help
        > me get started. I have searched Microchip and the web and last
years
        > messages from this news group but have not learned the secret of
finding
        > programs relating to a specific processor line yet. If anyone can
help me
        > get started, it would be greatly appreciated. I have started
trying to
        > write a program to read pin 7 (A-D value between 0-5V) and output
either the
        > upper 4 or lower 4 bits on pins 2, 3, 5, & 6 using pin 4 as an
upper/lower
        > selection input. I thought this would give me a good start
learning how to
        > set up I/O with the chip. I'll worry about interrupts, timers,
EPROM etc..
        > later.
        >
        > tks
        >
        > Mike
        >
        > Mike Montaigne
        > Neutron Program for Materials Research
        > Steacie Institute for Molecular Sciences
        > National Research Council
        > c/o Atomic Energy of Canada Ltd.
        > Station 18, Chalk River
        > Ontario, K0J 1J0, Canada
        > Email: montaignem@aecl.ca
        > Phone: (613) 584-3311 Ex:4005
        > Fax: (613) 584-4040
        >
        > --
        >
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        jim@jpes.com

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