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How to accomplish Wake On Lan (WOL) in system

Michael Huang3
Intellectual 2460 points
Other Parts Discussed in Thread: DP83848J, DP83816

Hi expert buddy,

My customer want their system WOL.

1 What is the common method to realise WOL. What does PHY do, what does MAC do and what does upper layer do?  The magic packet contains MAC address, so I think the WOL is a business of MAC layer, rather than PHY, is that right? What can our PHY do during WOL?

2 Can DP83848J be applied for WOL?  Do you have some comments?  It is a consumer application, they will not use other our PHYs, of which the price is much higher.

Thanks for your great support.

Michael Huang

  • 0
    TI__Mastermind 31600 points

    In early implementations of Wake on LAN, the functionality was in the MAC.  The system would be put into a low power state or a sleep state except for the MAC and the PHY.  The MAC would examine incoming packets.  If a "magic" packet with a specified pattern was received, the MAC would signal an interrupt to wake up the system. 

    More recently, MACs are commonly integrated into a controller and PHYs are discrete devices.  For this reason, the function of examining incoming packets for a "magic" packet is increasingly handled in the PHY. 

    The devices in the TI Ethernet portfolio are the MAC + PHY devices (e.g. DP83816).  However, we are always interested in the evolving needs of customers.  Could you provide some details on this particular application?  What additional features and functionality would be needed?  What are the needs in terms of power consumption, power supplies, package, etc.?

    Patrick

  • 0 in reply to Patrick OFarrell
    TI__Intellectual 2460 points

    Hi Patrick,

    They are evaluating this technology applied to LG Android Screen.

    Regards

    Michael