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Functional Descriptions

VMDS-10488 VSC7511 Datasheet Revision 4.2

Figure 12 •

Wake-On-LAN Functionality

Wake-on-LAN detection is available in 10BASE-T, 100BASE-TX, and 1000BASE-T modes., It is enabled

by setting the interrupt mask register PHY_INT_MASK. WOL_INT_ENA and its status is read in the

interrupt status register PHY_INT_STAT. WOL_INT_PEND. Wake-on-LAN and SecureOn are configured

for each port using the PHY_WOL_MDINT_CTRL register. The MAC address for each port is saved in its

local register space (PHY_WOL_MAC_ADDRx).

3.5.4

Ethernet Inline Powered Devices

The integrated transceivers can detect legacy inline powered devices in Ethernet network applications.

The inline powered detection capability can be part of a system that allows for IP-phone and other

devices, such as wireless access points, to receive power directly from their Ethernet cable, similar to

office digital phones receiving power from a Private Branch Exchange (PBX) office switch over the

telephone cabling. This can eliminate the need of an external power supply for an IP-phone. It also

enables the inline powered device to remain active during a power outage (assuming the Ethernet switch

is connected to an uninterrupted power supply, battery, back-up power generator, or some other

uninterruptable power source).

The following illustration shows an example of this type of application.

Tx Path

Rx Path

Wake-on-LAN

Detect

WOL_MAC_ADDR

ADDR_REPEAT_CNT

Secure-On enable

Secure-On

password length

Secure-On password

WoL Detected

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