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TM4C1294NCPDT: Ethernet circuit on general purpose PCB

digvijay khambe
Expert 2735 points
Part Number: TM4C1294NCPDT
Other Parts Discussed in Thread: EK-TM4C1294XL

Respected sir,

                       As in the last thread regarding Ethernet issue i came to know that i have to follow same Ethernet design as given in datasheet. We are planning on designing PCB according to the Ethernet design in launch pad kit. So my  questions are

1. What care should we take while designing PCB for Ethernet?? What are the rules to follow??

2. What should be the MAC address of custom board??

3. I  am planning on designing Ethernet circuit on general purpose PCB for testing purpose till i get new PCB. So will it (Ethernet circuit) work on General purpose PCB??  I have heard that because of high data rate wires may add inductance.

Regards,

Digvijay

  • 0
    Guru 117855 points

    IF such an, 'Ethernet sub-system, On a board' made sense - would not those Ethernet component vendors have implemented and/or provided such a board?     (to 'Speed, Ease, Enhance' user development.)  

    The presence & availability of such boards - should yield a strong clue.

    Your 'other' questions are left for vendor comment - although it proves likely that  (answering/related) vendor docs. exist - and await (your) proper search/find/review...

  • 0
    TI__Guru 72500 points
    1. See www.ti.com/.../spma056.pdf, section 4.1 or 4.2 depending on the PHY.

    2. You are responsible for obtaining the MAC address of your product. Here is some information:
    standards.ieee.org/.../pilot-ind.html

    3. I have never tried it, but am suspicious that the extra capacitance and inductance would be an issue. Can you use an EK-TM4C1294XL which has the Ethernet circuit on-board, and then connect the other signals needed to your prototype board?
  • 0 in reply to Bob Crosby
    Expert 2735 points

    Respected sir,

                       Thank you for quick reply.

    Bob Crosby said:

    2. You are responsible for obtaining the MAC address of your product. Here is some information:
    standards.ieee.org/.../pilot-ind.html

                      For temporary purpose i am using MAC address same as Launch Pad kit for my custom board. Will it work?

     

    Regards,

    Digvijay

  • 0 in reply to Bob Crosby
    Expert 2735 points
    Got it working with General purpose PCB with MAC same as LAUNCH PAD.
    Thanks for your time.
    Regards,
    Digvijay
  • 0 in reply to Bob Crosby
    Guru 55913 points

    Hi Bob,

    Lucrative private MAC registrar charges for the free internet that's not so free anymore. And of course no one on planet earth has ever come across a MAC already in use. Bigger question is who is recycling registered MAC's from all the failed NIC's that no one ever reported being DOA or in the land fills across the globe!

    Alas dynamic MAC server self assigning encapsulation points of switches/routers may one day change the device layer.