LS1046A-LX2160A connection

ddnxpcom — Fri, 03 Oct 2025 17:39:38 GMT

Hi,

I have a question regarding an LS1046A to LX2160A connection. If I configure a LS1046A SERDES to 2.5G SGMII, what would be the simplest way to connect it to a LX2160A SERDES port. This can be either fixed link, or phy/other. I'm looking for the best way to go about it, least amount of parts and most reliable.

Re: LS1046A-LX2160A connection

Oswalag — Tue, 07 Oct 2025 03:35:15 GMT

Hello,

You can set mac to mac connection or through a phy for auto-negotiation.

u-Boot sets the SerDes to auto-negotiate over SGMII. If the
device at the other end of an SGMII link is configurable to send a
PHY-side response of auto-negotiation type SGMII, then nothing has
to be changed. If the other end has no autoneg support or supports
only the MAC side SGMII auto-negotiation, then see LS1046ARM, Sections 31.8.1.1
and 31.8.1.2.

If you want to use a phy you can refer to both reference design boards (for example AQR113C).

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LS1046A-LX2160A connection

Re: LS1046A-LX2160A connection