SN65DPHY440SS: Extension by cable of D-PHY DSI communication

Hideki Ohkawa

Prodigy 30 points

Part Number: SN65DPHY440SS

I'm looking for a solution of title.

Is it possible with SN65DPHY440SSRHRR?

Plan:

- Cable length is 2m

- DSI is HS mode

- speed is max 800Mbps

Please introduce if it was possible with other devices.

I appreciate your cooperation.

over 3 years ago

0 Brian Zhou over 3 years ago

TI__Guru*** 145065 points

Hideki:

Do you know the loss of the cable at 400Mhz?

Regards

Brian

0 Hideki Ohkawa over 3 years ago in reply to Brian Zhou

Prodigy 30 points

Brian-san

Yes,I know.

But I'm looking for a possible way by bridge or SEDES or repeat etc.

How about DS90UH941/948?

Regards, H.Ohkawa.

0 Brian Zhou over 3 years ago in reply to Hideki Ohkawa

TI__Guru*** 145065 points

DS90UH941/948 may work too, but it's two chip solution.SN65DPHY440 can compensate with 4db EQ at 500Mhz and De with 2db.

Regards

brian

0 Hideki Ohkawa over 3 years ago in reply to Brian Zhou

Prodigy 30 points

Hi Brian san

Thank you for your information!

Which of DS90UH941/948 and SN65DPHY440 has the longer transmission distance?

I check datasheet of SN65DPY440.

https://www.ti.com/lit/gpn/sn65dphy440ss

According to page 21, the distance is total 13 inches.

I think this is too short.

Regards, H.Ohkawa

0 Brian Zhou over 3 years ago in reply to Hideki Ohkawa

TI__Guru*** 145065 points

SN65DPY440 can be handle around 6db loss, what is the loss of the 2m cable at 400Mhz?

Regards

brian

+1 Hideki Ohkawa over 3 years ago in reply to Brian Zhou

Prodigy 30 points

Hi Brian san

>what is the loss of the 2m cable at 400Mhz?

At the moment, I don't know because there is no environment.

But I don't think it's small.

>SN65DPY440 can be handle around 6db loss,

Thank you for your information, I plan to create an environment and consider it.

Regards,

H.Ohkawa

0 Brian Zhou over 3 years ago in reply to Hideki Ohkawa

TI__Guru*** 145065 points

yea, it's better to know the cable loss when considering system design,

Regards

brian

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SN65DPHY440SS: Extension by cable of D-PHY DSI communication