RTL8111C Ver la hoja de datos (PDF) - Realtek Semiconductor

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RTL8111C

INTEGRATED GIGABIT ETHERNET CONTROLLER FOR PCI EXPRESS™ APPLICATIONS

Realtek Semiconductor 

RTL8111C

Datasheet

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

• The destination address of the received Magic Packet is acceptable to the RTL8111C, e.g., a broadcast,

multicast, or unicast packet addressed to the current RTL8111C 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 RTL8111C, e.g., a

broadcast, multicast, or unicast address to the current RTL8111C 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 RTL8111C is configured to allow direct

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

Note: 16-bit CRC: The RTL8111C supports eight long wakeup frames (covering 128 mask bytes from offset

0 to 127 of any incoming network packet).

The corresponding wake-up method (message 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 RTL8111C may assert the corresponding wake-up method (message 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 RTL8111C to stop asserting the corresponding wake-up method (message or

LANWAKEB) (if enabled).

When the RTL8111C is in power down mode, e.g., D1-D3, the IO and MEM accesses to the RTL8111C

are disabled. After a PERSTB assertion, the device’s power state is restored to D0 automatically if the

original power state was D3cold. There is almost no hardware delay at the device’s power state transition.

When in ACPI mode, the device does not support PME (Power Management Enable) from D0 (this is the

Realtek default setting of the PMC register auto-loaded from EEPROM). The setting may be changed

from the EEPROM, if required.

Integrated Gigabit Ethernet Controller for PCI Express

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Track ID: JATR-1076-21 Rev. 1.5

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