• 0

Pin change to Ethernet PHY between Nexys4 and Nexys4DDR?


Anding

Question

Hello may I confirm that the connection of pins D10 and C11 to RXD1 and RXD0 have been reversed between the Nexys4 and Nexys4DDR?  The RM says so, but I wanted to double check this isn't a typo as no other connections to the Ethernet PHY have been changed.

Nexys4.png

Nexys4DDR.png

Link to comment
Share on other sites

4 answers to this question

Recommended Posts

Hi Anding,

That's alright for the duplicate post. I did not know that other users were getting that error frequently still; it used to happen more in the past, but its rare for me now. I'll let our web guy know that people are experiencing this. Thank you for the feedback!

Thanks,
JColvin

Link to comment
Share on other sites

Dear Anding,

That is a very strange case for pin changing so I went and checked the schematics. I found the two that in the two schematics for the Nexys4 and the Nexys4 DDR that the pins D10 and C11 have been flipped when connecting to the RXD1/Mode1 and RXD0/MODE0. The reason behind this is unclear to me but i'm glad you asked so that way in the future we can know that this isn't a typo. Thanks so much for pointing it out. I would have just assumed it was a typo.

Best Regards,

Bobby

4_c11.PNG

4_mode1.PNG

ddr_d10.PNG

ddr_mode1.PNG

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.