DP83822H: DP83822 IC bootstrap configuration

Aakash Dey

Part Number: DP83822H

Tool/software:

I want to know bootstrap configuration for the below resistor combination

0 Shane Hauser 7 months ago

Hi Akash,

Here is the bootstrap configuration the DP83822 would be in given those settings:

Your resistor values on RX_ER are incorrect for a bootstrap with internal pullup. For level 3 you should use a pullup of 6.2K and pulldown of 1.96K

Best,

Shane

0 Subhash R 6 months ago in reply to Shane Hauser

Hi Shane,

Can you please confirm the mode of configuration. Is it RGMII or RMII or MII.

Thanks,

0 Aakash Dey 6 months ago in reply to Shane Hauser

Thanks Shane,

To confirm Bootstraps configuration, The resistor combination used is RGMII mode with 25MHz clock. Please confirm

0 Shane Hauser 6 months ago in reply to Aakash Dey

Yes you are configured for RGMII mode with 25MHz clock. Please see the image in my previous response:

0 Subhash R 6 months ago in reply to Shane Hauser

Hi Shane,

Can you kindly confirm whether the Bootstrap configuration for RMII Master Mode is correct, or do we need to make any changes?

Thanks

Subhash R

0 Shane Hauser 6 months ago in reply to Subhash R

Hi Subhash,

For RMII master mode, you need to set RMII with 25MHz reference clock.

To set this, use the following Pullup/Pulldown combinations on RX_ER and RX_DV:

Best,

Shane

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