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DS90UB929-Q1: Switch timing b/w extenal clock and internal clock

Ryuuichi machida
Guru 12640 points
Part Number: DS90UB929-Q1

Hi,

I would like you to confirm about below.

* SER(DS90UB929) and DES are connected and both devices have already powered up.

In above case, when external PCLK does not exist, SER will output FPDLINK III data by using internal clock (approx 33MHz).

After that, when valid HDMI data input to SER, is it possible to keep to communicate back channel communication ?

Best Regards,

  

  • 0
    TI__Expert 8135 points
    Hello-

    It is not possible to have back-channel communication when there is no lock between SER and DES. When there is a switch-over from an internal clock reference and an external clock reference, the user needs to wait for the LOCK to go high before the communication over the back-channel can continue.

    Regards,
    Davor