piclist 2001\02\05\130827a >
Thread: 12xxx advice
www.piclist.com/techref/microchip/devices.htm?key=pic
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face BY : mike.....@STOPspamwhitewing.co.uk



On Mon, 5 Feb 2001 23:18:52 +1100, you wrote:

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Around US$1 Use the -A version, it's cheaper.
>Any advice re using these parts would be appreciated.
>Looks like I can code and test the main functions
>on a 16F84, allowing for using only the smaller
>instruction set of course. This will help speed up
>development time a lot.
Set up an assemble-time option to switch between the 2 part types, and
conditional assembly to set things like processor type, SFR and
register locations. If you just debug on the F parts and then change all the code to 5x,
you WILL find an obscure problem later that would have been much
easier to debug on the flash parts!

REMEMBER TO READ THE INTRC CALIBRATION VALUES OUT OF NEW JW DEVICES
BEFORE ERASING, AND WRITE THEM ON THE BOTTOM OF THE CHIP! A few other gotchas : Note that the TMR0 int/ext selection in OPTION overrides TRIS bit 2,
forcing it to input in external clock mode.
Remember that GP3 is always input only if not used as reset
When GP3 used as reset, it ALWAYS has a pullup - this can be a real
pain for some simple brownout circuits.

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