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DS90UB913Q-Q1: Effect of temperature on operating Frequency ?

Mina Habib
Prodigy 20 points

Part Number: DS90UB913Q-Q1
Other Parts Discussed in Thread: DS90UB914Q-Q1

Hi ,

I'm working with system containing both DS90UB913Q-Q1 and DS90UB914Q-Q1 connected together with Coax cable.

The Sub system containing DS90UB913Q-Q1 is placed in room with temperature -10 Celsius
while the other sub-system "containing DS90UB914Q-Q1 and Display Head unit" is placed in room with normal temperature 25 Celsius.

When operating in the mentioned conditions, Green pixels/Lines appeared at the head unit display.


  • 0
    Prodigy 20 points

    Hello Mina,

    Assuming that the display (TFT) is not damaged, you could verify the PCLK polarity.

    Quick test could be done by modifying the Pixel Clock Edge Select register in 913 (TRFB) OR 914 (RRFB) part. 

    Best regards,

    FrT

  • 0 in reply to FrT
    Prodigy 20 points
    Hi,

    First of all, Many thanks for your support and rapid response.
    Second, What should be expected from such a test ?

    Besides The Setup works fine when the two parts placed at normal room temperature 25 Celsius,
    The green Lines/Pixels appeared only in the case mentioned above.
  • 0 in reply to Mina Habib
    TI__Genius 12705 points
    Hello,
    Please confirm there are no errors in FPD-Link communication by monitoring pass and lock pins on the DS909UB914A.
    If no errors then likely it is due to timing of input or output parallel interface as previous suggestion.

    Regards,