• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 33 subscribers
  • Views 823 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.

DS90UR124 Supporting Video Reslution

Jin Kyung Han
Expert 1520 points
Other Parts Discussed in Thread: DS90UR124

Hello

According to the data sheet of R124, it can support Data rte of 1.03Gbps.

I would like to know supporting range of Video as the below.

Please check the below table.

Thanks

 

RESOLUTION

FRAME

AVAILABLE

X

Y

800

480

30

　

800

480

60

　

1024

768

30

　

1024

768

60

　

etc.

etc.

etc.

　

 

  • 0
    TI__Mastermind 29655 points

    Hi Jin Kyung,

    A good formula for estimating the supported resolution is the following:

    Width x Height x Frame Rate x Blanking Period Interval Factor = Pixel Clock

    The key to determining which data rate is supported is to estimate the required pixel clock and determine if it is within the lock range of the DS90UR124's pixel clock.

    The exact amount of blanking period is dependent on the end display, so it is hard to determine the exact pixel clock. A good conservative estimate is 1.2x. Usually, display blanking intervals are less than this factor.

    The DS90UR124 supports 5-43 MHz clock for up to 24-bit resolution (RGB888). From your requested table, assuming the formula above, we see the following:

    X Y Frame Blanking Interval Factor Est. Pixel Clock Within 5-43 MHz?
    800 480 30 1.2 13.82 MHz Yes
    800 480 60 1.2 27.65 MHz Yes
    1024 768 30 1.2 23.59 MHz Yes
    1024 768 60 1.2 56.62 MHz No

    It may still be possible to support 1024 x 768 with 60 Hz refresh rate if the blanking interval factor is less (for example, a factor of 1.1x would give you 51.9 MHz), so for estimates that are close to the PLL limit for the pixel clock, it is best to check with the display or ASIC vendor to determine what the blanking period or pixel clock supported range really is for your specific application.

    Regards,

    Michael

  • 0 in reply to Michael Lu (Santa Clara)
    Expert 1520 points

    Hello, Michael

    Thank you for supporting and your answer is very useful for me.

    Regards