• State
  • Locked Locked
  • Replies 6 replies
  • Subscribers 19 subscribers
  • Views 724 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CC2530EM Layout

RVG
Intellectual 720 points

Other Parts Discussed in Thread: CC2530EM, CC2591, CC2530

Hi all,

Would like to seek advise on the CC2530EM layout, why is the I/O trace is connected from top layer to bottom layer and lastly top layer? Is there any reason for not connecting it directly? Kindly advise. Thanks.

  • 0
    TI__Mastermind 39860 points

    You can route the I/O's on the top layer if possible. However, since there are quite a few I/O's, and some of them will have to cross, you will find that you do need to route some of the traces on the second layer.

  • 0 in reply to Sverre
    TI__Guru**** 317180 points

    They are connected directly on the CC2530+CC2591 combo design

  • 0 in reply to Sverre
    Intellectual 720 points

    Sverre said:

    You can route the I/O's on the top layer if possible. However, since there are quite a few I/O's, and some of them will have to cross, you will find that you do need to route some of the traces on the second layer.

    So there isn't any specific reason for the CC2530EM board to have the  I/O  to be connected from top to bottom and to top again? I do not see any cross happens on the EM board actually. So I was wondering if it is the recommended layout which needs to be followed, be it impedance matching (which not applicable to I/O i believe) or any reason behind.

  • 0 in reply to RVG
    TI__Guru** 106705 points

    Hi RVG,

    I know what you are asking about, and the short answer is no, this is not required. The reason for routing like this was to add some inductance to the traces for EMC/EMI purposes.

    /Fredrik

  • 0 in reply to Fredrik K
    Intellectual 720 points

    Fredrik K said:

    Hi RVG,

    I know what you are asking about, and the short answer is no, this is not required. The reason for routing like this was to add some inductance to the traces for EMC/EMI purposes.

    /Fredrik

    Hi Fredrik,
    Are you referring to that the routing cannot be routed directly? Top-Bottom-Top routing is to add inductance for the EMC/EMI purposes. If the traces are elongated at the top layer, will it performs the same?
    On the other hand, the CC2530-CC2591 EVM did not route the traces in this manner. Any advise?

    Thanks..

    RVG

  • 0 in reply to RVG
    TI__Guru** 106705 points

    As I wrote, the top-bottom-top routing is not necessary.

    /Fredrik