Richard G. Thomas wrote:
>
> > Recent questions on the 74 and 84s from programming point of view have
> > prompted me to repost the response to two messages that were written by
> > Jim Robertson of Newfound Electronics.
>
> > 16F84 has PWRTE bit reversed (like ALL newer parts) when compared to the
> > 16C84. All the spare config word bits in the 16F84 are used for code
> > protection. The effect of code protecting a 16F84 is different from a
> > 16C84.
> >
> > Programming wise, you can program the 16F84 as a 16C84. Remember to
> > reverse
> > the code protect bit and don't expect code protection to be the same.
>
> Confused/worried is this correct or should it read reverse the PWRTE bit?
>
> ----------------------------------------------------------------------------
> | Richard Thomas                                          Computer Officer |
> | Department of Design,                                                    |
> | Brunel University,  Runnymede,  Egham,  TW20 0JZ,  UK.                   |
> | Richard.Thomas@brunel.ac.uk                  phone:  01784  431341  x267 |
> ----------------------------------------------------------------------------

Sorry Richard, I was just quoting Jim's text without digesting it fully
myself, yes should read:

Programming wise, you can program the 16F84 as a 16C84. Remember to
reverse the PWRTE bit and don't expect code protection to be the same.

There I think that's closer.

Don McKenzie  don@dontronics.com   http://www.dontronics.com

SLI, the serial LCD that auto detects baud rates from 100 to 125K bps.
SimmStick(tm) A PIC proto PCB the size of a 30 pin Simm Memory Module.
Covers all versions of the PIC16cxx family plus the Atmel AT89C2051.