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TMS320F28388D: Ethernet Physical Layer Transceiver

TI-CSC
Genius 13890 points
Part Number: TMS320F28388D
Other Parts Discussed in Thread: DP83848C, , TMS320F28388S, C2000WARE, TMDSCNCD28388D

Hello E2E Experts,

Good day.

In general, some drawings / schemes in which there is an ethercat bus, I don't mean C # code?
I am using kicad trying to connect TMS320F28388S or TMS320F28388D to DP83848C. I cannot understand if I have to connect pin40 "CRS / CRS_DV" and pin42 "COL" of DP83848C to pins "ENET_MII_COL" and "ENET_MII_CRS" of TMS320F28388S or TMS320F28388D, since the ethercat peripheral of TMS320F28388F does not have these pins. ethercat doesn't need these pins? Does ethercat not need to figure out if there is collision between messages coming out and coming in simultaneously or to understand that the receiving medium is not inactive? If so can I leave DP83848C pins 40 and 42 unconnected?

Thank you in advance for your support.

Regards,

CSC

  • 0
    TI__Mastermind 42195 points

    the schematics for TMDSCNCD28388D can be found within C2000ware here: C:\ti\c2000\C2000Ware_4_01_00_00\boards\controlCARDs\TMDSCNCD28388D\Rev.B

    You can see an example of an etherCAT phy and an Ethernet PHY. Ethernet requires these lines, while etherCAT does not. COL and CRS are not connected to the MCU when using EtherCAT. I don't claim to be an expert here, but as I see it etherCAT is not a bus architecture so collisions are not much of a concern.

    Regards,
    Cody