> Your 115.2 Kbaud transfer rate requires 8.68 usec per bit time. How
> tolerant is the other end of your custom link to baud rate error?
>
> A 10 MHz PIC (400 nsec instruction time) will execute 21.7
> instructions in 8.68 usec. If your bit-bang loop runs in 22
> instruction cycles per bit, you'll have an error of about 1.4% slow.

Note that there is no law that you must send the bits in a loop: with some
calculation (and enough code space) you can unroll the loop and be up to 1
instruction accurate.

Wouter

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