I need to produce a 2MHz square wave on an output pin of a PIC16F876 running at 16MHz.  I have written a program that seems to do the job (my PC scope shows the 2MHz square wave on PB0, but just in case I'm missing something here, I thought I would ask.

My program takes advantage of the fact that, within any given memory page, the PC counter wraps around from the end of the page (PCL = 0xFF) to the beginning of the page (PCL = 0x00) if PCLATH is not incremented.   Essentially, it's a "brute-force approach to the problem:  page 1 is completely filled with 2048 "incf  PORTB, F" instructons and a small setup routine in page 0 jumps to page 1.  The output of RB0 appears to be a free-running 2MHz square wave on my scope, but I just want to be sure I'm not overlooking a small timing delay when the PC wraps around in page1.

Any comments or suggestions are welcome!

Thanks...  Ron

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