TFP401A: Can receive 12-bit double data rate?

Dear I.K.

Thank you for your support , maybe I understood not weel what my customer required.

I don't know if they have TFP410 (only I suppose maybe I misunderstand)

the requirement is:

The external DVI data interface is 12 bits wide and supports a maximum clock rate of 162 MHz

(double-data rate). Data is clocked out to the external DVI transmitter on both the rising and falling

edge of the DVI clock.

On each DVI channel, a pair of complementary clocks (DISPCLKM, DISPCLKP) is available, thus

allowing the DVI transmitter to be used in Dual edge mode

Please can you tell me if TF401 could be ok for to fit this requirement . I am a really newbie in DVI interface so I'm seraching for support

Thanks
Marco

Hi Marco,

Sorry it looks like I was mistaken in my last post. It turns out the TFP401 does not support this mode. It was a mode for the DVI Tx (TFP410) only since it was used at the time for Intel graphics cards. The receivers (TFP401) don’t support it.

Regards,
I.K.

Dear I.K.

sorry I can'understand  because I am a really newbie in DVI.

I know from my customer that they use

IC TRANSMITTER DIGITAL 64-HTQFP TFP410MPAPREP

Do you think that can trasmit as my previous request (maybe there is a problem in customer requirement because it has not be written by a technician)?

Can you suggest a receiveir sutable to be interfaced to TFP410MPAPREP? (for example TFP401)

If the requirement of the customer is accurate can you suggest an application note or a reference design to connect TFP410MPAPREP used in that way to one of your receiver?

Thank you

Marco

Hi Marco,

The TFP401 can only accept TMDS inputs. It can't accept 12-bit double data rate directly, but if they're using the TFP410 then they should be able to use the TFP401 with it just fine, since the TFP410 only outputs TMDS.

So the signal path will look like:

12-bit double data rate data --> TFP410 --> TFP401.

So the TFP410 + TFP401 is the solution here.

Sorry for any confusion.

Regards,
I.K.

Dear I.K. so TFP seems to be the right solution.

Some more info:

• I would like to perform some measurement to see exactly the DVI signal out of the customer equipment. Can you suggest some app note about how to perfrom measurement of DVI signal with an oscilloscope (I have four channel 1GHz 5GS)?
• Can you suggest an ev board for TFP401 and how to buy it?
• Are there any reference design or app note or TFP401
• Can you suggest a DAC IC that can be connected to TFP 401 to generate an analog video signal?

Thank you for your support

Best Regards

Marco Ruggeri

Hi Marco,

If you connect the TFP410 to the TFP401, you can easily just look at the TFP401's outputs with an oscilloscope. They are just digital LVTTL outputs.

You can order the EVM here: www.ti.com/.../tfp401pzpevm

You can find reference designs in the technical documents folder on the product page: www.ti.com/.../technicaldocuments

You can also go through the DVI specification: www.cs.unc.edu/.../dvi_spec-V1_0.pdf

I'm not familiar with DACs, but I don't think you would need anything special here, since the outputs of the TFP401 are just digital outputs.

Regards,
I.K.