In-board Ethernet connection

masaru ishikawa

Other Parts Discussed in Thread: DP83867IR

When connecting 100BASE-TX to each other on the board, I think that a transformer is not required and it is sufficient to connect directly, but is it correct?

over 4 years ago

0 LeonardEllis over 4 years ago

TI__Guru 71526 points

Hello Masaru,

Please provide more detail. What board are you referring to? What is the interface device in the circuit?

Thank you,

~Leonard

0 masaru ishikawa over 4 years ago in reply to LeonardEllis

Prodigy 10 points

Thank you.

It has a configuration similar to VME and connects CPU boards with 100BASE-TX.(Only inside Subrack)
The board will be newly designed including the back board.

Device Candidates>
PHY: DP83867IR
L2SW: KSZ8795CLX

Connection image>
| CPU board | Backboard |
1: MAC(CPU)-PHY-Connector-L2SW
2: MAC(CPU)-PHY-Connector-L2SW
3: MAC(CPU)-PHY-Connector-L2SW
4: MAC(CPU)-PHY-Connector-L2SW
5: MAC(CPU)-PHY-Connector-L2SW

0 Joe Vanacore over 4 years ago in reply to masaru ishikawa

TI__Genius 17360 points

Hi Masaru,

I would recommend that you refer to this for app note for ethernet without a transformer.

https://www.ti.com/lit/an/snla088a/snla088a.pdf

I also recommend that you review specific device datasheet for MDI implementation.

Kind Regards,

Joe

All information in this correspondence and in any related correspondence is provided “as is” and “with all faults”, and is subject to TI’s Important Notice (http://www.ti.com/corp/docs/legal/important-notice.shtml)

0 masaru ishikawa over 4 years ago in reply to Joe Vanacore

Prodigy 10 points

Thank you very much.
I understand.

Interface

Interface forum

In-board Ethernet connection