=20
> A 'hexadecimal' crystal is more suitable for common baud rates, but
> whether you can or do use one depends on the functional priorities. For
> example if a microsecond timer is more important than comms, then a
> 20MHz would be preferable (for the 200ns cycles). You might have to
> compromise somewhere
>=20
> An 18.432MHz crystal in the calculations
>=20
> ((18432000/115200)/16)-1
>=20
> =3D 9.000000, no error
>=20

There is also a 19.something that gives exact baud rates (19.66088? or some=
thing like that). The other option would be to 'overclock' slightly at twic=
e 12.288 which is also an exact baud rate frequency (hence it tended to be =
used as the standard frequency for 8080 CPUs).


--=20
Scanned by iCritical.

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