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Compiler/AM3358: Sitara ARM Processors AM335x Starter Kit 1000M Ethernet external loop back does not work

Drew Tkac1
Intellectual 850 points

Part Number: AM3358

Tool/software: TI C/C++ Compiler

Hello,

We have purchased your "Sitara ARM Processors AM335x Starter Kit." We have been running various loop back tests on the Ethernet PHY. We discovered that the exernal loop back does not work when set to 1000M speed. All of the following configurations do work: internal loop back 10M, 100M, 1000M and external loop back 10M and 100M. We are using the RGMII interface. We are using your EMAC_basicExample_skAM335x_armExampleproject out of pdk_am335x_1_0_17. From the software we can determine that it does NOT link for 1000M. We have used the following loopback cable (we have T568B) See below:

What is wrong?

Thank you.

Drew Tkac