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

D'oh!  I just looked up again and noticed that one of your SX chips has an interrupt running -- this with screw up your baud rate.  What you should do is switch to an interrupt-driven UART on this side.  Or -- and only if your interrupt timing is constant -- you could "tweak" the baud setting on that side to accommodate the time spent in the interrupt.  This is a bit tricky, but has been done (Bean did a servo driver using interrupts with a modified baud value -- it's in the Projects forum).

Sorry I didn't catch the interrupt thing earlier; I'm still exhausted from my move from Dallas to SoCal.

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