RE: RS422 and avr microcontrollers

You might try pointing Google at RS485 instead - you'll have better =
luck.  RS485 and RS422 are similar; RS422 handles point to point =
connections, where RS485 can handle multiple nodes on a shared bus.  I =
just finished an AVR design where I used RS422 as the physical =
connection between two Mega128's using their UARTs to transfer data.  =
Works great.  Basically, I studied everything I could find about RS485 =
and then substituted RS422 in the final design.  I found that National =
Semi had a lot of good app notes - specifically AN847, AN979 and AN1057. =
 If you can't track them down, let me know and I'll send you the PDF's.

Dave

---------------
Dave Harper             Chiaro Networks
972-739-7919 (voice)	251 Renner Pkwy.
972-739-8020 (fax)	Richardson, TX 75080




> -----Original Message-----
> From: D I Freeman [mailto:[email protected]]
> Sent: Sunday, February 08, 2004 11:51 PM
> To: [email protected]
> Subject: [avr-chat] RS422 and avr microcontrollers
>=20
>=20
>=20
> Hi,
>=20
> I am trying t find some information on connecting an AVR=20
> (specifically an
> Atmega162) to a RS422 bus, but can't find anything useful on=20
> google. Can anyone
> recommend a suitable site that can give me some hints in this area.
>=20
> Thanks
>=20
> D
>=20
> _______________________________________________
> avr-chat mailing list
> [email protected]
> http://www.avr1.org/mailman/listinfo/avr-chat
>=20