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DS90UH988-Q1: The DS90UH988-Q1 deserializes 4K video signals.

gou zi
Prodigy 30 points
Part Number: DS90UH988-Q1

The DS90UH988 is a 4K FPD-Link to OpenLDI unstringer. However, the specification indicates that OpenLDI has a clock frequency of 420MHz. According to the calculation, the clock frequency of 4K 60fps signal: 3840×2160×60=497664000,497.66400MHz. The OpenLDI clock frequency is not enough.

  • 0
    Prodigy 90 points

    If the frequency is slightly higher, it should also be usable； I guess

  • 0
    TI__Genius 10140 points

    Thank you for contacting TI China E2E forum and choosing our products as part of your solution.
    Regarding your query, please give us some time to confirm this issue.

  • 0 回复 FRANK1
    TI__Genius 10140 points

    Understanding this correctly, the SER sends over 4K video over FPD-Link to the UH988 deserializer -> 3840x2160x60 = 497.664 MHz.

    OpenLDI output can handle up to 210 MHz per port, meaning 420 MHz total.

    • You are correct, the limitation of the 420 MHz over OLDI ports means this resolution and frame rate is not supported.

    Depending on the display specifications, the fps may be lowered to support 4k to meet the frequency requirement.