TMDS171: Address setting and changing of resistor setting with outputting HDMI

Hirotaka Matsumoto

Part Number: TMDS171

Hi all

Would you mind if we TMDS171?

<Question1>
We would like to confirm address setting of TMDS171.
Is the device address is set at start up with A0/A1 setting?
Or, is it possible to change the device address setting at any time with A0/A1 setting?

<Question2>
With outputting HDMI, is it possible to change of resistor setting?
Or, after changing of resistor setting, does it require to reset?

Kind regards,

Hirotaka Matsumoto

over 6 years ago

0 David (ASIC) Liu over 6 years ago

TI__Guru**** 177676 points

Hirotaka-san

I2C address is set using A0 and A1.

Output of HDMI can be tuned by changing VSADJ resistor value, you can further tune the output by writing to the Misc Control register (0x0Ch).

Both A0/A1 setting and resistor setting can not be changed on the fly. TMDS171 has to be reset after changing them for the new value to be sampled correctly.

Thanks
David

0 Hirotaka Matsumoto over 6 years ago in reply to David (ASIC) Liu

Guru 27585 points

David san

Thank you for your reply!

Output of HDMI can be tuned by changing VSADJ resistor value, you can further tune the output by writing to the Misc Control register (0x0Ch).
->Just in case, is it possible to change VSADJ resistor value on the fly?

Kind regards,

Hirotaka Matsumoto

0 David (ASIC) Liu over 6 years ago in reply to Hirotaka Matsumoto

TI__Guru**** 177676 points

Hirotaka-san

No, VSADJ resistor can't changed on the fly.

Thanks
David

0 Hirotaka Matsumoto over 6 years ago in reply to David (ASIC) Liu

Guru 27585 points

David san

Thank you so much for your reply!

No, VSADJ resistor can't changed on the fly.
->After changing it, does it require to wait for next signal input?

On the other hand, is it possbile to change Data Lane EQ and Clock Lane EQ on the fly?
Especially, our customer would like to change Data Lane EQ and Clock Lane EQ on the fly.

We appreciate your help.

Kind regards,

Hirotaka Matsumoto

0 David (ASIC) Liu over 6 years ago in reply to Hirotaka Matsumoto

TI__Guru**** 177676 points

Hirotaka-san

EQ can't be changed on the fly when it is in pin-strap mode, but it can be changed on the fly in I2C mode.

Thanks
David

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TMDS171: Address setting and changing of resistor setting with outputting HDMI