It's a different programming algoritm.
Look under www.microchip.com -> litterature -> programming spec

Niklas

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Fr=E5n: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.ED=
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F=F6r Caisson
Skickat:        den 3 april 2001 10:00
Till:   PICLIST@MITVMA.MIT.EDU
=C4mne: [PIC]: 16F84A programming problems ...

Hello All,

  I've seen messages asking for differences between the "normal" (16F84)
and the "A" versions.  In respect to to coding there seems not to have
changed anything.

But I've got a problem in transferring the code to the controller
(programming).  I can program a normal 16F84, but a 16F84A will aport
within a few (0 thru 50) cycles with an error.  Even stranger, when I mov=
ed
the programmer to another computer, all went
Allright ...

My programmer is a minimalistic one, connected to the printerport. The
digital pulses on the controller itself are therefore quite ugly
(rounded-off).  Because of the Schmitt-trigger inputs of the 16F84 on RB6=
 &
RB7 this did not pose a problem.

But I'm getting the vague idea that the 16F84A is missing those (the
Schmitt-trigger input's on the Data & Clock inputs) ...

Can anyone substanciate my suspicions ?

Regards,
  Rudy Wieser

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