From: "Spehro Pefhany" <speff@INTERLOG.COM>
Sent: Tuesday, August 17, 2004 5:44 PM

> Some revisions of the 16F628 have a nasty bug in the CCP that might
> cause you problems. They reverse logic in the comparison after the third
> match..

Thanks, I wasn't aware of that and it could have led to trouble.  Is there
an easy way to check if the chips I have have that error?  I have 4 16F628's
bought a few months apart from 2 sources, so hopefully at least one is good.

It turns out I won't be using the 16F628 anyway.  There's no ADC, which I
didn't realize.  Since I plan to use a 10-turn pot as the frequency control,
I will need an ADC.

It seems like I have a lot of different pics but the only 14-bit ones with
an ACD are 16F676, 16F876 and 16F877.  The 8xx ones are much larger (not to
mention more expensive) than I think the project needs, so I'll be using the
16F676.  Are there any quirks about that one that I should know about? :)

So far, I'll need at least 10 I/O lines.  I hope the 12 on the 16F676 isn't
shooting myself in the foot.

Jason

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