• State
  • Locked Locked
  • Replies 4 replies
  • Subscribers 100 subscribers
  • Views 870 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.

WEBENCH® Tools/AM5K2E04: Pin Package Length File Request

RJ Hall
Prodigy 365 points

Part Number: AM5K2E04

Tool/software: WEBENCH® Design Tools

My customer is asking about a Pin Package length file for the AM5K2E04XABDA4.  This file provides information regarding signals INSIDE the AM5K2E04 part.  For example, in order to route the DDR3 properly, the pin package length file needs to be incorporated into their ECAD tools, so that they can properly tune the lines.

Can you please provide this information?  The customer is in need of this information quickly.


Thanks,

RJ Hall

  • 0
    TI__Guru 65405 points
    Hi Ronald,

    I've forwarded this to the HW design experts. Their feedback should be posted here.

    BR
    Tsvetolin Shulev
  • 0
    TI__Mastermind 42545 points

    Hi RJ,

    We don't provide the substrate trace length information for KeyStone parts. That variation of the substrate lengths is incorporated into the length matching requirements for the DDR3 interface. If those requirements are met, the lengths inside the part are not needed.

    Regards,

    Bill

  • 0 in reply to Bill Taboada
    TI__Prodigy 365 points
    I don't know how this information will specifically be used, but below is is the response from the customer. Can you confirm that your answer is final before I shut this down? Thanks.
    "This information is known since it is taken into consideration in the IBIS model. We can accept RLC information with the dielectric constant to calculate on our own or even timing data like what Xilinx supplies. Every vendor of every part we use with DDR/PCIe provides these internal package lengths, so I’m sure this is just a misunderstanding. This is getting quite a bit of unnecessarily negative visibility with our leadership."
  • 0 in reply to RJ Hall
    TI__Mastermind 42545 points

    Hi RJ,
    I know that other manufacturers do provide this information but TI choose not to follow that support model. The information is not available. This has been expressed in a couple of other E2E posts. All length matching should be followed from the ball of the part to the destination.
    Regards,
    Bill