DP83848I: DP83848 include Spread Spectrum function?

Shu-Cheng LIN

Guru 11785 points

Part Number: DP83848I

Hi Sirs,

Sorry to bother you.

As title, does DP83848 had a register to do spread spectrum function?

Because the EMI performance is so weak.

If not, have any experience to reduce the EMI??

Thanks for your reply.

over 8 years ago

0 Aniruddha Khadye over 8 years ago

TI__Mastermind 18425 points

Hello,

There is not register setting for spread spectrum in DP83848I. EMI problems can come up due to system design as well. There is a reference design for DP83848 which is optimixed for EMI performance. You can review it here: www.ti.com/.../tida-00207
Following are the two app notes which can also be helpful in improving system level EMI performance.
www.ti.com/.../snla079d.pdf
www.ti.com/.../snla107a.pdf

-Regards,
Aniruddha

0 Shu-Cheng LIN over 8 years ago in reply to Aniruddha Khadye

Guru 11785 points

Hi Aniruddha

Thanks for your reply.

We saw document "AN-1469" PHYTER Design & Layout Guide

The 6.1 External Oscillator Clock Source

What are RS and RP Max/min value?

Interface

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DP83848I: DP83848 include Spread Spectrum function?