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DP83TC813R-Q1: make DP83TG813R-Q1 go to sleep directly after powering up.

Part Number: DP83TC813R-Q1
Other Parts Discussed in Thread: DP83TG721S-Q1

Tool/software:

Hello Expert,

May I ask are there any methods to make DP83TG813R-Q1 enter into sleep directly after powering up?

I see the INH is output to connect EN of core power. Can the INH be controlled by FPGA IO directly?

Best regards,

Wenting

  • As well as DP83TG721S-Q1, is there a way to make it go through  SLEEP mode directly after powering up without changing any registers? 

  • Hi Wenting,

    For all of our devices that support TC10 sleep mode, they can enter into sleep mode directly after powering up without changing any registers if the WAKE pin is pulled LOW.

    In order to wake up the device, (1) the wake pin must be pulled HIGH or (2) the PHY must receive a remote wake signal from a connected link partner. 

    I see the INH is output to connect EN of core power. Can the INH be controlled by FPGA IO directly?

    INH is an output pin that will tell you whether or not the PHY is asleep. If they want to connect it to the FPGA input pin, they can, but the FPGA should not output anything to INH. 

    Best regards,

    Melissa

  • Hello Mellissa,

    For remote wake up, is necessary to have the high pulse of WAKE pin after the MDI signal?  Can WAKE pin keep in low level?

    Best regards,

    Wenting

  • The wake up high pulse during remote wake timing is only for wake forwarding right? If no needs of wake forwarding, the WAKE can be kept in low?

  • Hi Wenting,

    For remote wake up, is necessary to have the high pulse of WAKE pin after the MDI signal?  Can WAKE pin keep in low level?

    For remote wakeup via MDI, the Wake pin can be kept LOW.

    The wake up high pulse during remote wake timing is only for wake forwarding right? If no needs of wake forwarding, the WAKE can be kept in low?

    If the Wake pin on the PHY is kept low, it will not be able to power on unless it woken up remotely by a link partner.

    If the Wake pin on the PHY is low, it will also not be able to forward a remote wake pulse the link partner. 

    I hope this is clear.

    Best regards,

    Melissa