DP83620: DP83620SQX/NOPB_Trace length constraints

Srikanth Kacchu1

Part Number: DP83620

Hi Team

We are using DP83620 in our design for MII interface. Below image shows the length constrains from application note snla079d.

Trace length of 6 inches mentioned is from RJ45 to PHY or MAC to PHY?

2 inches length match is provided for MII/RMII. Is there any length match required for Transmit and Receive pair?

Regards

Srikanth Kacchu

over 2 years ago

0 Vikram Sharma over 2 years ago

TI__Genius 16025 points

Hello Srikanth,

You may target to match PHY to RJ45 traces with an accuracy of 50mils.

Regards,

Vikram

0 Srikanth Kacchu1 over 2 years ago in reply to Vikram Sharma

Expert 1185 points

Thanks for the support. What about the trace length clarification asked above?

0 Vikram Sharma over 2 years ago in reply to Srikanth Kacchu1

TI__Genius 16025 points

6" is the guideline for MAC : MII/RMII

0 Srikanth Kacchu1 over 2 years ago in reply to Vikram Sharma

Expert 1185 points

Hi Vikram

Thanks for the conformation.

What is the purpose of JTAG pins? Is there any emulator and utility available to access the PHY through this JTAG?

Regards

Srikanth Kacchu

0 Vikram Sharma over 2 years ago in reply to Srikanth Kacchu1

TI__Genius 16025 points

Hello Srikanth,

JTAG is to enable board level boundary scan tests. Here is the related folder :

https://www.ti.com/lit/zip/snlc035

For better tracing kindly open a new related topic if further clarification is required. I will be closing the current thread regarding earlier discussion.

Regards,

Vikram

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DP83620: DP83620SQX/NOPB_Trace length constraints