SK-AM62P-LP: strap to disable auto-negotiation of Ethernet(forced set to 100Mb/s)

Part Number: SK-AM62P-LP
Other Parts Discussed in Thread: AM62P

Tool/software:

Dear Champs,

My customer is trying to disable auto-negotiation of Ethernet in AM62P SK EVM and trying to set it to 100Mb/s.

When they checked HW schematic of AM62P SK EVM, they found below R373/374 is boot strap for DP83867(RGMII1)

But, they could not find these registers(R373, R374) in Gerber_PDF files and only find R331, R332 for DP83867(RGMII2) in red rectangle.

So, they assumed R373 and R374 are in below blue rectangle. Is this right?

When they checked these values of blue rectangle, they found it is 2.0K ohm and 1.76~1.8K ohm at each.

They confused on this and are not sure if these registers are right as these values should be 5.76K ohm and 2.49 ohm at each based on HW schematic and below datasheet of DP83867.

Could you please clarify this and where they can find R373/374 registers to disable auto-negotiation in DP83867(RGMII1) in AM62P SK EVM?

Thanks and Best Regards,

SI.

  • Hi Sung-IL,

    I did a research but was not able to identify the R373 and R374 in the sprr487b/Proc164/1_PROC164E1-1 too. I will need some time to discuss internally with an expert.

    I hope I get back with an answer to you tomorrow.

    Thanks 

    Kind Regards,

    Anastas Yordanov