Re: problem with RS485 or RS232

Davide Canina wrote:

> Dear all, <BR>
> I would like to know if it's possible to create an interface from Virtex
> II-FPGA's to serial RS485 or RS232,please ? <BR> Do you have some
> application notes or technical issues for this problem,please? <BR> Thank
> you very much for your help. <BR> Best regards, <BR>

If you want to attach RS485 or RS232 lines directly to the FPGA I would 
not do this. And, as Valentin said, you get some voltage level problems.
Normally, one uses special RS232 or RS485 transceivers that are driven
by standard levels.

As for the logical part, you need to implement some standard UART 
functionality in your FPGA. If you don't know how to do that, have a 
look at the link Martin gave you, or check out www.opencores.org.

Regards,
Mario