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TMS320F28377D: Regarding EtherCAT reference design without External memory Interface(tidrle9a.pdf(BOOSTXL-ETHERCAT))

Saravanakumar S93
Expert 1300 points
Part Number: TMS320F28377D

Hi All,
Since, I am not getting the reference evaluation board design. We are following tidrle9a.pdf(BOOSTXL-ETHERCAT)

Currently, we are designing the PCB based up on TMS with ET1100
Below are the configuration details,
• 2 EtherCAT Ports enabled (P_MODE[1:0] = 00).
• Port 0(IN) and Port 1(OUT) will be used.
• SPI Communication is used in between 32bit uC and ET1100.
• We are not using any External memory interace.
   
As per the TI EVB schematics tidrle9a.pdf(BOOSTXL-ETHERCAT), Below are the clarifications,
# Since, we are not using the External memory. Is this pin-B11 PDI[7]/CPU_CLK_OUT needs to be Open(Notconnected) or we can use as PDI ? 
# Since, we are not using the External memory. What will be the state of Byte High Enable(BHE) Pin-C10 PDI[5].Do we need to pull down or Pull up ? (For 32 pin microcontroller/SPI Interface)
# Pin-A4 PDI[22] is connected with Pin-C10 PDI[5] with pull down method. Is this read back using Pin-A4 PDI[22] necessary?
# For the above configuration, Do we need to follow the below settings?
 P_CONF[0]= 1 (Port0 = MII) = VCC connection
 P_CONF[1]= 1 (Port1 = MII) = VCC connection
 P_CONF[2]= Not connected. Left as open.


Regards,
S.Saravanakumar

  • 0
    TI__Intellectual 1620 points

     

    Hello

     

    TMDSECATCNCD379D/BOOSTXL-ETHERCAT is capable of working in EMIF or SPI mode. Details are included in the technical and software documentation. Switch S1 on the BOOSTXL-ETHERCAT schematics, selects the SPI/EMIF mode.

     

    Questions below are related to Beckhoff’s ET1100 chip specific. The configuration we have used works for both modes. Please refer to Beckhoff’s documentation for additional functionalities and use case on PDI signals while using SPI mode. Here is our general observations specific to this board.

     

    As per the TI EVB schematics tidrle9a.pdf(BOOSTXL-ETHERCAT), Below are the clarifications,
     # Since, we are not using the External memory. Is this pin-B11 PDI[7]/CPU_CLK_OUT needs to be Open(Notconnected) or we can use as PDI ? 

     

    • Not used in SPI mode


    # Since, we are not using the External memory. What will be the state of Byte High Enable(BHE) Pin-C10 PDI[5].Do we need to pull down or Pull up ? (For 32 pin microcontroller/SPI Interface)

     

    • Not used in SPI mode


    # Pin-A4 PDI[22] is connected with Pin-C10 PDI[5] with pull down method. Is this read back using Pin-A4 PDI[22] necessary?


    # For the above configuration, Do we need to follow the below settings?
     P_CONF[0]= 1 (Port0 = MII) = VCC connection
     P_CONF[1]= 1 (Port1 = MII) = VCC connection
     P_CONF[2]= Not connected. Left as open.

     

    • Needed for MII/Linkact functions.

    Thanks

    Sam