In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:

In assembly with a 50 MHz clock it would be no trouble; at 1M bps the period is 1 uS; at 50% duty cycle of the clock the on and off times are 500 ns -- at 50 MHz the instruction cycle is 20 ns.  You can certainly set the appropriate TRIS register (to pull the pin low or let it float) is less than the 25 cycles you have available.  Seems like board layout and those considerations is going to be your bigger concern.

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