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DP83825I: dp83825

Prodigy 70 points

Replies: 5

Views: 165

Part Number: DP83825I

Hi Team,

The system structure is using STM32F4 MCU + DP83825I, MDIO communication is norma,Why does the indicator light on the router not turn on and the linkstatus in the dp83825 register is 0 when connected to the router through RJ45?

thinks


The state value of 0x00 is 0x3100

The state value of 0x04 is 0x01E1

The state value of 0x00 is 0x5002

The state value of 0x00 is 0x8000

the router can successfully link up when connected to another 100Mbps device

-Regards

  • Hello,

    Please cross reference the registers you mentioned with the datasheet and ensure that the mode selected on the PHY is compatible with the router. The link may not be established if the PHY is in the wrong mode.

    Can you please explain what the state values mentioned above are. Are they registers that you are writing to?

    Thanks,

    Vibhu

  • In reply to Vibhu Vanjari:

    hi  Vibhu

    The state value of 0x00 is 0x3100

    The state value of 0x04 is 0x01E1

    The state value of 0x10 is 0x5002

    The state value of 0x19 is 0x8000

    because

  • In reply to user5336454:

    Hello,

    Thanks for sending me the register settings, please also share your schematic.

    Thanks,

    Vibhu

  • In reply to Vibhu Vanjari:

    Hello,We use RMII Slave mode.Could you please check the sch for us. Which component is wrong?0003.HGW929_EthernetZigbee_mCtrl_V1.0_20190822.pdf

  • In reply to user5336454:

    Hello,

    The DP83825 has integrated MDI termination resistors. Please remove these resistors as they may be causing the issue.

    Refer to http://www.ti.com/lit/df/snlr041/snlr041.pdf for the EVM schematic.

    Thanks,

    Vibhu

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