DP83822I: DP83822I clock out specification

Motoyasu Hattori

Part Number: DP83822I

Hi,

DP83822I can output 50MHz clock from RX_D3. Could you please let us know the rise time / fall time of 50MHz clock out from RX_D3 on DP83822I? My customer wants to use this clock for CPU's MAC interface. Please advise us.

Thanks and best regards,
M.HATTORI

over 2 years ago

0 Kallikuppa Sreenivasa over 2 years ago

TI__Guru** 123808 points

Hello M.HATTORI

Thank you for the query.

Are you asking about the RGMII clock output when DP83822i is used as RGMII master ?

What is the application, do you have some additional details.

Regards,

Sreenivasa

0 Motoyasu Hattori over 2 years ago in reply to Kallikuppa Sreenivasa

TI__Expert 8695 points

Hi,

My customer uses RMII Master Mode. Input clock is from 25MHz Xtal. Application is PLC. If you need more information, please let us know.

Thanks and best regards,
M.HATTORI.

0 Kallikuppa Sreenivasa over 2 years ago in reply to Motoyasu Hattori

TI__Guru** 123808 points

Hello M.HATTORI

Thank you and noted.

What is the use case for connecting the 50MHz to the MCU? Is it for RMII interface ?

Do you have a diagram what customer is looking to do.

Regards,

Sreenivasa

0 Kallikuppa Sreenivasa over 2 years ago in reply to Kallikuppa Sreenivasa

TI__Guru** 123808 points

Hello M.HATTORI

Is the customer looking to configure the DP83822i in the above configuration ?

Regards,

Sreenivasa

0 Motoyasu Hattori over 2 years ago in reply to Kallikuppa Sreenivasa

TI__Expert 8695 points

Sreenivasa-san,

Yes, same configuration. Please support us.

>> Could you please let us know the rise time / fall time of 50MHz clock out from RX_D3 on DP83822I

Thanks and best regards,
M.HATTORI.

+1 Kallikuppa Sreenivasa over 2 years ago in reply to Motoyasu Hattori

TI__Guru** 123808 points

Hello M.HATTORI-San,

Please refer to the below section

7.16 Timing Requirements, RGMII

Regards,

Sreenivasa

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DP83822I: DP83822I clock out specification