Alex,
We have used the MM5450 (and others in that family) with 16C74. I have some C
source code I could share if you are interested. Let me know.

Mark A. Corio
Rochester MicroSystems, Inc.
200 Buell Road, Suite 9
Rochester, NY  14624
Tel: 716-328-5850
Fax: 716-328-1144
http://www.frontiernet.net/~rmi/
****** Designing Electronics for Research and Industry ******