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TMS320F280049C: FSI hardware design concern communicate with long distance and board-to-board

Johnny Chen
Expert 5140 points

Part Number: TMS320F280049C
Other Parts Discussed in Thread: TMDSFSIADAPEVM

Hi Champ,

I am asking for my customer.

They are trying to use FSI to communicate from board-to-board with several MCUs and FPGA.

According to customer's requirement, kindly help on below questions.

(1). From board-to-board with long distance communication, would the communication with FSI be robust enough ?

(2). If yes, is there any h/w design that should be concerned or any suggested guideline for that ? 

(3). Since FSI could use single-ended signals and differential signals, it is suggested to add differential transceivers for differential signals with longer distances, correct ?

Thanks,

Johnny.

  • +1
    TI__Mastermind 45606 points

    Hi Johnny,

    Johnny Chen said:
    (1). From board-to-board with long distance communication, would the communication with FSI be robust enough ?

    Yes it can, but not just by itself depending on the distance. Would strongly suggest using differential devices like LVDS or RS-485/422 to greatly increase the possible transmission length and increase noise immunity.

    Johnny Chen said:
    (2). If yes, is there any h/w design that should be concerned or any suggested guideline for that ? 

    Please see the TMDSFSIADAPEVM, which uses differential devices (also digital isolation if interested in that). Also please see the SPRACM3 app note for using FSI with multiple devices and in different network topologies. If you have questions about a specific topology let me know, even if it isn't in the App Note.

    Johnny Chen said:
    (3). Since FSI could use single-ended signals and differential signals, it is suggested to add differential transceivers for differential signals with longer distances, correct ?

    Yes definitely, as mentioned above.

    Best,

    Kevin