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PICList Thread
'TRIS Instruction on the PIC16Cxx (was: "Re: 16c74 '
1997\02\20@145204 by Andrew Warren

Bob Segrest <spam_OUTPICLISTTakeThisOuTspamMITVMA.MIT.EDU> wrote:

> The PIC16C74 has two banks of registers.  As it happens the TRIS
> registers are located in the upper bank.  I don't think the TRIS
> PORTC command in your example will work.
> I was under the impression something more like this is required...
> [example using RP0 and MOVWF TRISC snipped]
> If anyone knows this is not required, I would be interested to hear
> about it...


The TRIS PORTx instructions work (and will always work) on all the
current PIC16Cxx processors... For ports A, B, and C, there's no
real need to go through the machinations specified in the Microchip
data books.

That said, I should mention that I personally never use the TRISx
instructions on those parts with accessible TRIS registers, unless
I'm REALLY pressed for space or time.


=== Andrew Warren -
=== Fast Forward Engineering - Vista, California
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