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RTL8111

INTEGRATED GIGABIT ETHERNET CONTROLLER FOR PCI EXPRESS™ APPLICATIONS

Realtek Semiconductor 

RTL8111

Datasheet

In the above case, if wakeup support is not desired when main power is off, it is suggested that the

EEPROM PMC be set to 02 76.

Link Wakeup occurs only when the following conditions are met:

• The LinkUp bit (CONFIG3#4) is set to 1, the PMEn bit (CONFIG1#0) is set to 1, and the corresponded

wake-up method (message, beacon, or LANWAKEB) can be asserted in the current power state.

Magic Packet Wakeup occurs only when the following conditions are met:

• The destination address of the received Magic Packet is acceptable to the RTL8111, e.g., a broadcast,

multicast, or unicast packet addressed to the current RTL8111 adapter.

• The received Magic Packet does not contain a CRC error.

• The Magic bit (CONFIG3#5) is set to 1, the PMEn bit (CONFIG1#0) is set to 1, and the corresponding

wake-up method (message, beacon, or LANWAKEB) can be asserted in the current power state.

• The Magic Packet pattern matches, i.e. 6 * FFh + MISC (can be none) + 16 * DID (Destination ID) in

any part of a valid Ethernet packet.

A Wakeup Frame event occurs only when the following conditions are met:

• The destination address of the received Wakeup Frame is acceptable to the RTL8111, e.g., a broadcast,

multicast, or unicast address to the current RTL8111 adapter.

• The received Wakeup Frame does not contain a CRC error.

• The PMEn bit (CONFIG1#0) is set to 1.

• The 16-bit CRCA of the received Wakeup Frame matches the 16-bit CRC of the sample Wakeup Frame

pattern given by the local machine’s OS. Or, the RTL8111 is configured to allow direct packet wakeup,

e.g., a broadcast, multicast, or unicast network packet.

Note: 16-bit CRC: The RTL8111 supports two normal wakeup frames (covering 64 mask bytes from

offset 0 to 63 of any incoming network packet) and three long wakeup frames (covering 128 mask bytes

from offset 0 to 127 of any incoming network packet).

The corresponding wake-up method (message, beacon, or LANWAKEB) is asserted only when the

following conditions are met:

• The PMEn bit (bit0, CONFIG1) is set to 1.

• The PME_En bit (bit8, PMCSR) in PCI Configuration Space is set to 1.

• The RTL8111 may assert the corresponding wake-up method (message, beacon, or LANWAKEB) in

the current power state or in isolation state, depending on the PME_Support (bit15-11) setting of the

PMC register in PCI Configuration Space.

• A Magic Packet, LinkUp, or Wakeup Frame has been received.

• Writing a 1 to the PME_Status (bit15) of the PMCSR register in the PCI Configuration Space clears

this bit and causes the RTL8111 to stop asserting the corresponding wake-up method (message,

beacon, or LANWAKEB) (if enabled).

Integrated Gigabit Ethernet Controller for PCI Express 14

Track ID: JATR-1076-21 Rev. 1.2

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