In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Peter Van der Zee wrote:

Hi Kevin;

In using a multi-tasking approach that lets you do "standard" serial while at the same time doing other timed tasks, the maximum baud rate with a 50 MHz resonator would be in the neighborhood of 250 K bits per second.

If you were willing to temporarily suspend other operations while you were doing serial work, that speed could increase to somewhat more than double that.

That said, certain situations can be contrived that would tolerate 1 Mega bit per second, but that takes some of the generality away.

Under special circumstances, and not using "standard" serial format (as in dropping the start and stop bits) I have been able to get several hundred SX's to serial among themselves very reliably at 10 Mega bits per second.

So the answer to your question about maximum baud rate is very dependent on what you are trying to do, and also very much on what ELSE the micro has to do.

Cheers,

Peter (pjv)

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