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TFP410: Implementation of TFP410PAP - Design Guide.

Daniel García Escobar
Prodigy 10 points
Part Number: TFP410

Tool/software:

Hello everyone,
We are developing a device with an HDMI interface that uses the TFP410PAP IC to convert RGB888 (3.3V) signals to HDMI.
After reviewing the available documentation, we have designed the schematic based on the recommendations in the datasheet, but as there is no reference design available, we are not 100% sure that the implementation is correct. We are therefore attaching an image of the schematic in case any experts or anyone who has previously worked with this IC could take a look and let us know if we are missing any components necessary for it to work.

Thank you in advance.

TFP410PAP_Implementation.pdf

  • 0
    TI__Guru**** 178036 points

    Hi,

    For PD, when I2C is disabled (ISEL = low), a high level selects the normal operating mode. A low level selects the powerdown mode.

    Do you want to enable the data de-skew enable? The de-skew function can be enabled either through I2C or by this pin when I 2C is disabled. 

    Otherwise the schematic looks ok.

    Thanks

    David

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

    Hi David,

    The idea is to configure the device via I2C, and according to the IC datasheet, the PD pin should be connected to GND. That is why we have connected it to GND. The only thing that would happen is that when the IC restarts (ISEL/RST = 0), it would enter power-down mode, is that correct?

    Regarding de-skew, we will also configure it via I2C, so we have connected it to GND to prevent the DKEN pin from floating. This way, when the IC restarts and I2C is disabled, de-skew will be disabled to avoid problems, since pins DK1, DK2, and DK3 are configuring the I2C address instead of the de-skew value.

    Thank you for your help,

    Daniel.

  • 0 in reply to Daniel García Escobar
    TI__Guru**** 178036 points

    Daniel

    Then I do not see an issue with the schematic.

    Thanks

    David