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.

  • TI Thinks Resolved

OPT9221: MAC test features

Prodigy 60 points

Replies: 5

Views: 988

Part Number: OPT9221

Hello,

What are the signal paths tested by the PHY and MAC test withing the OPT9221.  Does the MAC test generate input data that passes through the DDR2 RAM interface and then on to the output block?  Does the PHY test just generate a ramp signal directly at the output block without testing any other internal paths?

We are having issues with intermittent noise and image quality and the MAC test ramp signal is showing the same image quality problems, so I would really like to know if the DDR2 is in the path of the MAC test.

What other issues could we have if the ramp image generated by the MAC test is speckled/noisy but the PHY test ramp pattern is OK.

Thanks,

Mike

  • Hi Mike,

    Let me check on this for you, and the reply will be posted on this E2E thread.

    Meanwhile could you please tell us more about your application? It seems you're already at a point of developing a camera system? Please reply to ti-3dtof@list.ti.com for more private discussion.

    -Larry
  • In reply to Larry Li:

    Hi Larry,

    I work with Mike.  The application is related to traffic monitoring.  However, the tests we are doing at present are just enabling the phy test and mac test.

    Best regards,

    Dave McMordie

     

  • In reply to Dave McMordie:

    MAC test goes through DDR, while PHY test does not.

  • In reply to Larry Li:

    Thanks Larry. Does MAC test involve the opt8241 in any way, or is all output generated from within the opt9221?

    Best,

    Dave
  • In reply to Dave McMordie:

    Dave,

    MAC test does not involve OPT8241 except for the fact that the OPT8241 LVDS clock output has to be active.

    Regards

    Bharath Patil

    3DToF Landing Page

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.