Hi all,
I'm facing exactly the same issue. If you're not planning to use PoE functionality, I recommend choosing an RJ-45 connector with integrated magnetics (MagJack) without PoE support. This can significantly reduce the cost of the connector – at least that's what my analysis suggests.
In my project, I’m going to use the following connector: RJMG2V1SLN12W5R
I believe the center taps of the transformer (CT or TCT pins) should be properly biased by connecting them to VCC. However, I’m unsure whether they should be connected to 1.8V or 3.3V. Has anyone here dealt with this and could share some insight?
Thanks in advance!
EDIT: I know that the RPi CM4 uses a Gigabit Ethernet PHY - Broadcom BCM54210PE, unfortunately I cannot find a datasheet for this IC.
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I'm facing exactly the same issue. If you're not planning to use PoE functionality, I recommend choosing an RJ-45 connector with integrated magnetics (MagJack) without PoE support. This can significantly reduce the cost of the connector – at least that's what my analysis suggests.
In my project, I’m going to use the following connector: RJMG2V1SLN12W5R
I believe the center taps of the transformer (CT or TCT pins) should be properly biased by connecting them to VCC. However, I’m unsure whether they should be connected to 1.8V or 3.3V. Has anyone here dealt with this and could share some insight?
Thanks in advance!
EDIT: I know that the RPi CM4 uses a Gigabit Ethernet PHY - Broadcom BCM54210PE, unfortunately I cannot find a datasheet for this IC.
Statistics: Posted by Ventran — Tue Jun 24, 2025 6:15 am