Douglas Wood wrote:
> I've not ever seen a micro with RS-anything built into the micro
> itself. I wouldn't want one, either. If the RS-485 (or
> RS-422/232/etc.) part of the circuit got fried, you'd have to replace
> the entire micro, not just the much less expensive transceiver chip.

This seems to be a common position, but does it really matter?  In most
cases if the unit fries, you are going to replace the whole unit.  Whether
that's due to the RS-232 interface or the micro doesn't make any difference.
It just doesn't make sense to spend $50 technician time to diagnose and
repair the problem on a $40 board.


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