HDMI Transmitter/Receiver Support on TMS320DM6467

Hi,

the interface of the TFP4xx use 24-Bit parallel RGB data. The DM6467 has single 16-Bit interfaces (Y-Pr-Pb). You need an color space converter from YPrPb to RGB. The SIL HDMI transmitter/receiver have this inside. But you can use an FPGA for this conversion.

Regards,

Schulle

Schulle said:

the interface of the TFP4xx use 24-Bit parallel RGB data. The DM6467 has single 16-Bit interfaces (Y-Pr-Pb). You need an color space converter from YPrPb to RGB. The SIL HDMI transmitter/receiver have this inside. But you can use an FPGA for this conversion.

I'm also looking to use the DM6467T with DVI inputs and outputs.  I've found TI's "HDMI Transmitter/Receiver Support on TMS320DM6467", which suggests the SIL part that Schulle's post mentions.

However, Schulle mention "TFP4xx use 24-bit parallel RGB data".  I don't know that the TFP4xx part is and would like to understand the comment and why it was made.

Thanks.

Helmut

The TFP410 DVI transmitter ( http://focus.ti.com/docs/prod/folders/print/tfp410.html)  uses RGB24 as its input data. From TFP410 daasheet:

The TFP410 is a DVI-compliant digital transmitter that is used in digital host monitor systems to T.M.D.S. encode
and serialize RGB pixel data streams. TFP410 supports resolutions from VGA to UXGA and can be controlled
in two ways: 1) configuration and state pins or 2) the programmable I2C serial interface (see the terminal
functions section).
 

The SIL9136 transmitter ( which I ould get some info on) takes in YCbCr422 digital data input and internaly converts it to RGB and thansmits via HDMI interface.

the DM6467, on its VPIF out supports YCbcr422 in BT.1120 mode which is effectively understood by SiL part. from the application note

CLK: VP_CLKO2 → IDCK
• Data
• Y/C 4:2:2: (Y) VP_DOUT[7:0] → D[23:16], (C) VP_DOUT[15:8] → D[35:28]
• Y/C 4:2:2 muxed: (Y/C) VP_DOUT[15:8] → D[23:16], D[35:28] not connected
• VSYNC, HSYNC, DE (not supported by DM6467): VSYNC, HSYNC, and DE need to be ....

  So one can use Sil9136 HDMI transmitter chip to interface effectively with DM6467 EVM to HDMI.

Hope it clarifies.

thx,

-Manju

Fantastic help, Manju.  Thank you very much.  Perhaps I can get some more...!

My application needs to receive input from a variety of cameras.  Some output analog video of SD quality.  Others output digital video.  One specifically says it outputs a 1920x1080 frame.  Elsewhere the spec says it outputs HDMI or (DVI or SMPTE-292M).

I recognize that the SIL9134/9135 chips should support 1920 wide.  HOWEVER, the intellectual property protection hoops to jump through are obnoxious, and there's a license fee for the included HDCP capability.  I don't need audio or HDCP.  Because of these things, I may rather go with DVI.

So, you mention that the TFP410 is a DVI transmitter.  I'm sure there's a corresponding receiver somewhere, too.  You say it can support UXGA.  That's 1600 x 1200.  So now I find myself looking to expand that width to include 1920.  I notice WUXGA at 1920 x 1200.  Does the TFP410 or a related part support that?

Most of all, my boss, aka the "slavemaster", has me on a very short timeline of weeks from today to initial production.  Don't laugh, I'm serious, and also I should be able to accomplish it, based on previous such scenarios.  Therefore, I need to have a smooth and short path to follow.  I'm strongly considering the DM6467T along with what appears to be the correct EVM, the Spectrum Digital HD1080p EVM.  This has composite in (analog SD), component in (analog HD), and component out (analog HD).  After some baseline work, I would need to augment either the EVM or my own prototype board with composite *out* (analog SD), digital HD *in*, and digital HD *out*.  For the digital HD in/out, I'm looking at HDMI or DVI.  (I need the analog SD support for legacy use.)

This brings us back to the subject of this post. ***  Would interfacing with and getting running with a TFP DVI transmitter/receiver pair be straightforward?  Might it be easier than the same for the SIL HDMI parts?  And while we're at it, do you know an easy way to replace the DACs and whatever that got dropped from the DM6446 to the DM6467(T)?

Thanks VERY much,

Helmut

Helmut,

Please try to use the same thread for similar questions. I just answered another thread on almost the same thing. http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/99/t/65687.aspx

BTW, it is not SIL, it is SiI (Si-licon, I-mage). In case this causes any searching problem.