> Bob Ammerman wrote:
>
> > The user is depending on  the receiver recognizing the start bit
correctly,
> > which is problematic at best.
>
> Why ?
> He is using the UART as an async UART, and hence uses normal,
> standard start/stop bits. It's of no importance that the
> higher level software then decodes the "bytes" as Manchster code...

Because he really doesn't have a good idea of where the start of the message
is. Typically the receiver will either be generating noise on its digital
output, or possibly squelch will keep it quiet. In either case, the UART can
easily see the wrong bit as the start of things (it can't tell a real start
bit from a data bit).

Bob Ammerman
RAm Systems

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