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TFP410: TFP410pap to hdmi no output

kuo jeffery
Prodigy 10 points
Part Number: TFP410

Hi For example, why the output of the accessory line has no image?

  • +1
    TI__Guru**** 177476 points

    Hi,

    Is /PD high or low?

    Are you also providing a proper reset to the TFP410 on power-up (see section 7.4.4 of the datasheet)?

    Can you measure the clock output? Please note you would need to provide external 50ohm termination to 3.3V in order to measure the clock.

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    Prodigy 10 points

    Hi

    1. The PD is High

    2. TFP410_DKEN;TFP410_MSEN;TFP410_TFADJ 10K ohm up 3V3

    3. ISEL/R\E\S\E\T\ is Low i have Manul CTL High to low but same no single output

    4.Can you give me reference design download link for me check my schematic TKS!!

  • 0 in reply to kuo jeffery
    TI__Guru**** 177476 points

    Hi,

    I do not have a TFP410 reference schematic, but looking at the schematic,

    1. PD# is high for normal operation
    2. ISEL/RESET# is low so that I2C is disabled
    3. Check that BSEL/SCL is high to indicate 24-bit, single-edge mode
    4. Check status of DSEL/SDA and compare with Table 1 in the datasheet as shown below

    Do you see an output clock when measuring it with a scope? Please make sure the output is terminated with 50ohm termination to 3.3V.

    Thanks

    David