TFP410: Pin-Strapping Mode and Termination

Martin Seeger

Expert 5411 points

Part Number: TFP410
Other Parts Discussed in Thread: TIDEP0040, TIDEP0038

Dear Team,

our customer considers the TFP410 as replacement for the SiI1178.

However two questions:

The customer would like to use the device in pin strapping mode (ISEL/RST GND). Will this implementation come with any restrictions on the other configuration pins (like BSEL, DSEL,…).
> The customer would like to change those configurations on the fly - will this still be possible?
The current SiI1178 design foresees source termination of a 300ohm resistor and a 0.1uF capacitor between the + and – lines of each differential pair (see page 28 of the SiI 1178 datasheet). I could not find any indication that the TFP410 needs a termination or that it has the termination integrated. A quick check in the TIDEP0038 and TIDEP0040 showed that the schematics did not have any (external) termination.

Looking forward to your feedback.

Best Regards
Martin

over 6 years ago

0 Jorge Llamas (SWAT) over 6 years ago

TI__Expert 7395 points

Hello Martin,

We have assigned a support engineer, so you should be getting a response soon.

Regards,
Jorge

0 Joel Jimenez0 over 6 years ago

TI__Mastermind 18655 points

Hello Martin,

I2C does provide more functionality particularly in the use of the MSEN output.

No external termination needed.

Regards,
Joel

0 Stefaan over 6 years ago in reply to Joel Jimenez0

Prodigy 190 points

Hello Joel,

I posed the questions to Martin, who forwarded them in the E2E forum.

I'm aware that the I2C mode provides more functionality, but there are reasons why we don't want to use it.

My question actually was, whether the pin strap settings (in pin strap mode) can be changed on the fly, or if they have to be static. We would like to change them after the TFP 410 was powered up, will that work?

Kind Regards,

Stefaan

0 Martin Seeger over 6 years ago in reply to Stefaan

TI__Expert 5411 points

Hello Joel,

any update on the questions from Stefaan?

Thanks and best regards,
Martin

0 Joel Jimenez0 over 6 years ago in reply to Stefaan

TI__Mastermind 18655 points

Hello Stefaan,

Sorry for the late response. Yes, you can change the pin configuration states when after the TFP410 was powered-up. The device should recover and show the video automatically when any changes are performed in the configuration or input video.

Regards

0 Stefaan over 6 years ago in reply to Joel Jimenez0

Prodigy 190 points

Thanks Joel, this answers the questions I had.

Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

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TFP410: Pin-Strapping Mode and Termination