Rolf wrote:
> Good point. All writes to PORTx are written to the latch anyway, so clrf=
=20
> PORTx is identical to clrf LATx
>
> The port pin diagrams indicate that fact as well.
>
> Further, all analog pins read as '0', all digital pins read the state of=
=20
> the signal (which for outputs may be a mis-match to the LATx value if=20
> you have slow-changing signal lines...).
>
> But, in all cases, clrf PORTx =3D=3D clrf LATx
>
> On the other hand, it's not an error to do it twice... and further,=20
> operations other than 'clrf' on PORTx will/may produce a different=20
> result than the same operation on LATx... so perhaps it is good practice=
=20
> to treat them 'both' explicitly in the initialization routine...
>  =20

Sorry, you're confusing me now!  How would MOVWF PORTx and MOVWF LATx=20
ever end in a different result?
David...
--=20

___________________________________________
David Duffy        Audio Visual Devices P/L
Unit 8, 10 Hook St, Capalaba 4157 Australia
Ph: +61 7 38235717      Fax: +61 7 38234717
Our Web Site: www.audiovisualdevices.com.au
___________________________________________

--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.