Harold Hallikainen <harold <at> hallikainen.org> writes:

> I've done an open collector UART based bus with multiple devices. There's
> a pull-up resistor on the bus. UART RX pins tie directly to the bus.

That works well and is not limited to pics. 8051s also work with such a bus. It
can also be debugged and controlled from a PC. I have also used such a bus in
the past. The only problem is the requirement for a stable clock, which excludes
RC parts. A solution is the Dallas 1-wire bus which is self clocked.

Peter


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