Pls How can I make 16F877A use 15MHz Xtal

[coyotegd]

No need to edit your INC file. Just add a line of assembler to your program:

@ DEVICE HS_OSC

Then add a line of PIC Basic:

DEFINE OSC 20

I don't believe Pic Basic Pro can use 15MHz properly. See page 170 of Compiler manual: "The acceptable oscillator definitions are: . . . 12, 16, 20 . . ." If you use "DEFINE OSC 15", I believe PIC Basic will default to 4MHz, but then you have changed "DEVICE XT_OSC" to "DEVICE HS_OSC", so it may not work at all.

[ChrisHelvey]

Hey, what's wrong with "condensers," I always thought it made sense...just cram (condense) those little electrons in there until no more will fit. ;-)

As for "resonators," the more I learn about "resonance," the more methinks the numbers have a "little" something to do with harmonics. I'll stick with what the design specs state.

Got a few laughs from this thread.


Chris Helvey

[Acetronics2]

Hi, Chris

a Condenser is something generally used to change physical phase ( from gas state to liquid state ... see how to make bad Whisky or alcohol ... i.e ... or how your climate works).

Alain

[ChrisHelvey]

I was being tongue and cheek, of course. But really, there is a part on my air conditioner full of Freon that must be 10,000uF! It runs hot though...