• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 98 subscribers
  • Views 150 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.

AM62A7: Why recommended stack-up for routing the DDR interface is different with AM62x's?

Jingcheng ye
Intellectual 560 points
Part Number: AM62A7

Hello TI Expert

In SPRAD66, Unit 1.3 PCB Stack-Up :The recommended stack-up for routing the DDR interface is a ten or twelve layer stack up.

But in SPRAD06,Unit 1.3 PCB Stack-Up :The minimum stack-up for routing the DDR interface is a six-layer stack up.

My question would be whether AM62A7 has different DDR PHY design compare with AM62x series?

What's lead to different stack-up recommendation from SOC side view?

BR Jingcheng

  • +1
    TI__Guru* 85960 points

    Yes, the AM62A7 is a 32bit DDR interface which has max data rate of 3733MTs, while the AM62x is a 16-bit interface with a max data rate of 1600MTs.  The extra signal routing and speed necessitate more routing layers.

    Regards,

    James