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TFP401: HDMI to LVDS

Gary Wang1
Intellectual 350 points
Part Number: TFP401
Other Parts Discussed in Thread: SN75LVDS83B

Dears,

Hello, we want to design a HDMI signal into LVDS function of the adapter board, using LVDS screen display output, among which, the HDMI interface for 1.4 standard, LVDS display resolution of 1280x800, 24-bit, only require output image, not output audio. The scheme adopts TFP401,SN75LVDS83B to realize signal conversion.

At present, there are problems: after HDMI access to the adapter board, the industrial control board can not identify the adapter board. The industrial control board can not send the TMDS signal to the adapter board, so there is no image output on the screen.

Want to consult the following questions:

1, this scheme can realize HDMI signal input, LVDS signal output, match ability Thai display screen normal output;

2, whether the IIC of HDMI interface needs to add equipment to store EDID information;

3, whether TI has recommended IIC solution or not.

  • 0
    TI__Mastermind 35130 points
    Hi Gary,

    1. These devices will allow for HDMI (with no audio) to LVDS, yes. I cannot say if it will work with your Thai display without looking at the display's datasheet.

    2. The TFP401+SN75LVDS83B do not have i2c capability. The TFP401 is not involved in the EDID communication. The TFP401 will just receive and deserialize the incoming TMDS signals, while the SN75LVDS83B will just receive and serialize the incoming RGB signals.

    3. See #2 above.

    Regards,
    I.K.