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Re: Slightly unmatched UART frequencies



HI Simon,

Simon Peacock <[EMAIL PROTECTED]> wrote:
> Data is only sent at the speed it arrives at.. so although you are 1.5%
> fast.. you actually end up adding extra stop bits into the stream to
> compensate .. is simple and oh so clever.

Well, fair enough, if you KNOW that your data source is truly supposed to be
'nominally,' say, 9600bps, then you can be clever and get away with an
internal nominal bit rate of 9600*1.015=9744bps.  However, if you tell me
you have such a device that you'd like to connect to one of my devices,
you'd better be able to convince me there really is no way your device could
start spewing data continuously at 9744 bps when my 9600 bps receiver isn't
going to be able to hack it!

>This is exactly what modems did
> for years to cope with the V.14 shaved bits when they couldn't do them.

Interesting; I didn't know that either!

---Joel





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