Hardware layout with Kinetis K64 and LAN PHY RMII

VilemZ — Tue, 31 Jan 2017 08:26:15 GMT

Hello,

I am working on own design with microcontroller Kinetis K64 and LAN PHY. I had any issues with this connection. Now, I changed some parts and I changed PHY because package of this chip. I selected DP83848. Have you anybody have any experiences with it?

I am attaching my schematic, could you anybody check it, please?

Re: Hardware layout with Kinetis K64 and LAN PHY RMII

Jonathan_Iglesias — Thu, 16 Feb 2017 17:23:07 GMT

Hi Vilem Zavodny,

I apologize for the delay.

I was checking your design used as reference the actual FRDM K64 Schematics REV E, I mention the Revision because there was a change in the design, some resistors connected to the TD+_R1 and TD-_R2 and RD+_R7 and RD-_R8

they are marked as DNP (Do not populate), this is because this resistors will increase the load on the signals thus shorten the cable lengthin rev D(this resistors are populated) the cable length is ~2 feet long. while rev E can achieve ~200+ ft . this is the only thing that I found different from our FRDM K64 schemati. please verify this with your PHY DS.

And let me know if this helped you.

have a great day !

Best Regards

Jonathan

Kinetis MicrocontrollersのトピックRe: Hardware layout with Kinetis K64 and LAN PHY RMII

Hardware layout with Kinetis K64 and LAN PHY RMII

Re: Hardware layout with Kinetis K64 and LAN PHY RMII