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RS422 support on F2808

Juan Gonzales
Mastermind 37340 points

We have a customer which needs RS422 communication interface to F2808. 

Can SCI be used to connect to RS422 provided the proper termination circuitry or do we need additional external device to support 422 (from data manuals, it seems SCI can support baud rates and communication bus needed for RS422)?  If so, is there a software driver that implements the 422 protocol?

btw, I realize the termination circuitry and driver support can be use case dependent, but I would just like some brief feedback on

1) is it possible  for F2808 to support RS422 (hardware and software perspective)?

2) has any 422 implementation been done on F2808 before?  This F2808 boad by Oztek seems promising, but is missing much of the critical information (schematics / BOM) that would add some clarity to these questions.

  • 0
    TI__Guru 57255 points

    Juan,

    I think we'll need some more details.  RS-422 really only denotes signaling-levels and the network definition:
    http://en.wikipedia.org/wiki/Rs422

    You'll likely need a few RS422 transmitters/receivers/transceivers to change the external device's data to single-ended signals and then connect these signals up to some C2000 peripheral.  What peripheral it connects to will depend on the external device.  I've seen RS422-based encoders which often connect up to QEP as well as RS-232 UART range-extenders which would connect up to our SCI.


    Thank you,
    Brett