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paul.mnt
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Registered: ‎05-10-2013

VCU128 PHY RESET

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I am porting a design with Ethernet from VCU118 to VCU128. I was wondering how to proceed about the RESET_B port: will the PHY get a reset during the power cycle, or is it mandatory to control the PHY GEM3_ENET_RESET_B pin?


If reset must be controlled explicitly, is there a reference design to do so on the VCU128, for which the pin is  behind the port extender TCA6416A?

Thank you
-- Paolo

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paul.mnt
Observer
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Registered: ‎05-10-2013

I completed my design and it appears the Ethernet PHY does work even without driving the reset pin.

View solution in original post

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nanz
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Registered: ‎08-25-2009

Hi @paul.mnt ,

You have mentioned GEM3 reset pin in your post. Just to confirm first if you're talking about MPSoC device or VCU128? GEM3 is the Hard Gigbit ethernet controller inside of the PS on MPSoC.

 


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paul.mnt
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Registered: ‎05-10-2013

Thank you for your reply. I do mean VCU128. The name of the pin is reported in the board user guide.

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paul.mnt
Observer
Observer
715 Views
Registered: ‎05-10-2013

I completed my design and it appears the Ethernet PHY does work even without driving the reset pin.

View solution in original post

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paul.mnt
Observer
Observer
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Registered: ‎05-10-2013

If anyone needs help figuring out SGMII and DDR4 on VCU128, here you can find my code.