Instant Interupts with a 12f675

[Darrel Taylor]

<Pre>LCD 6<br>TX/RX radio 2<br>Buttons 3-8 (depending)<br>Crystal 2 (serial comms)<br> ---<br> 13-18 pins</pre>

14-pin devices can only have 12 I/O's at best.

And being battery operated, it might be better to use an LF device.
I think the smallest of those is 18-pin, like the 16LF628A. Works down to 2 volts @ 4mhz.
But they cost a little more.

Like you say, there's a lot to choose from. And it's better to have a few extra pins for whatever comes up, instead of changing to a bigger PIC later.

[wlundonly]

Darrel,

I can't find that part...are you sure about the part number?

Thanks,

Bill

[Darrel Taylor]

It's strange that a search doesn't pull up anything on the microchip site, but it doesn't.

The info for the LF version is in the same datasheet as the F version.

From Digikey ...
http://search.digikey.com/scripts/Dk...words=16LF628A
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[wlundonly]

Thanks Darrel.

I'm going to use the 16LF628A.

Let's see how far I get before I get stumped. LOL