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TMDS1204: TMDS1204RNQR

Vaishnavi P
Prodigy 90 points
Part Number: TMDS1204

Tool/software:

I am having some queries regarding tmds1204rnqr IC. Below are my attached queries
1.  SRC_PRNT ---- this signal connected in the sink application reference design in the datasheet, both pull up and pull down option is provided. Please clarify how to do circuit for this signal and if pull up and pull down is required, what is the resistor value should be used.
2. Pin strapping mode, i used both Pull up and Pull down options as per how it is done in the sink and source applications reference design mentioned in the datasheet. Is it ok to do the schematics as per reference design mentioned in the datasheet for sink and source applications, or any other points need to consider for pin strapping mode.

  • 0
    TI__Guru**** 176281 points

    Hi,

    Can you please share your schematic? How is SRC_PRNT being connected to TMDS1204?

    For TMDS1204 design, please refer to the reference design in the datasheet or the EVM schematic in the TMDS1204 EVM user guide.

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    Prodigy 90 points

    Hi David,
    Please find my attachment in that HDMI IN and OUT section schematics is attached. Please review and provide me your feedback for the design.

    HDMI IN & OUT RE-DRIVER - TI PART.pdf

  • 0 in reply to Vaishnavi P
    TI__Genius 11786 points

    Hi Vaishnavi, 

    Below are my comments.
    HDMI INPUT0 Comments:

    1. I noticed that this device is in pin strap mode. Therefore, there is no need to populate these two resistors for I2C connection. 

    2. There is already 1k pull up for these pins so there is no need to populate these resistors. 

    HDMI OUTPUT0 Comments:

    1. The device is in pin strapping mode so there is no need to populate these resistors.
    2. We recommend CMC that has cutoff frequency three times that of the frequency of the data rate the device supports. There is no model of the attenuation for EMI8143MUTAG. We recommend NFG0QHB542HS2D for HDMI 2.1. This will be okay for HDMI 2.0.

    Based on your schematic:

    Vaishnavi P said:
    1.  SRC_PRNT ---- this signal connected in the sink application reference design in the datasheet, both pull up and pull down option is provided. Please clarify how to do circuit for this signal and if pull up and pull down is required, what is the resistor value should be used.

    This pin does not connect to our device so we have no recommendation. Please refer to the source's documentation. 

    Vaishnavi P said:
    2. Pin strapping mode, i used both Pull up and Pull down options as per how it is done in the sink and source applications reference design mentioned in the datasheet. Is it ok to do the schematics as per reference design mentioned in the datasheet for sink and source applications, or any other points need to consider for pin strapping mode.

    Pin strapping is good as is.

    Best,
    J