What voltage are you running the chip at? I ran into a similar problem
moving from the 16c61 to the 16c622. Turned out that I had not set the
brown out detect and I was operating the chip at 3V. The brown out detect
kept the oscillator from running. See section 9.4.4 of the datasheet.
        That MIGHT be the problem?

Harold


On Fri, 21 Jul 2000 18:23:06 -0700 Mauricio Bustos <mabustos@YAHOO.COM>
writes:
> Hello,
>
> I've very much enjoyed this list in the past and have
> used it very much to answer many of my questions.  I
> have one now that I haven't been able to solve yet.
>
> I'm trying to port code from a 16f84-10 to a
> 16c622a/jw for more RAM.  I've taken the appropriate
> porting precautions for the 622a.  The problem is that
> the oscillators won't start up when I use the 622a.
> For the equivalent program on the f84 the oscillators
> work like a charm.
>
> I've tried a 10MHz ceramic resonator and a 4MHz
> crystal (with 2 22pF caps).  I've tried compiling with
> both XC and HS (from a previous post).  I've tried on
> a bread board and a soldered board.  I admit that I'm
> not quite sure how oscillators work but I've read as
> much as I can and can't understand what is happening
> here.  Could there be a setting on the 622a that I'm
> missing?
>
> Here is my config line:
>
>  __CONFIG _CP_OFF & _WDT_OFF & _HS(or XC)_OSC &
> _PWRTE_ON
>
> Thanks in advance for your consideration!
>
> m
>
> --
> Mauricio Bustos
>
>
> ...on the road to Burning Man 2000
>
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