WG82574L S LBA9 Intel, WG82574L S LBA9 Datasheet - Page 95

• Manufacturer Part Number: WG82574L S LBA9
• Description: CONTROLLER, ENET, INTEL 82574L, 64PQFN
• Manufacturer: Intel

Specifications of WG82574L S LBA9

• Ethernet Type: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: 0°C To +85°C
• Digital Ic Case Style: QFN
• No. Of Pins: 64
• Package / Case: QFN
• Interface Type: I2C, JTAG, PCI, SPI
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Power Management and Delivery—82574 GbE Controller
5.5.2
5.5.3
PCIe Power Management Wake Up
The 82574L supports PCIe power management based wake ups. It can generate
system wake-up events from three sources:
Activating PCIe power management wake up requires the following steps:
Normally, after enabling wake up, the operating system writes a 11b to the lower two
bits of the PMCSR to put the 82574 into a low-power mode.
Once wake up is enabled, the 82574 monitors incoming packets, first filtering them
according to its standard address filtering method, then filtering them with all of the
enabled wake-up filters. If a packet passes both the standard address filtering and at
least one of the enabled wake-up filters, the 82574:
If enabled, a link state change wake up causes similar results, setting PME_Status,
asserting PE_WAKE_N and setting the Link Status Changed (LNKC) bit in the WUS
when the link goes up or down.
PE_WAKE_N remains asserted until the operating system either writes a b1 to the
PME_Status bit of the PMCSR or writes a 0b to the PME_EN bit.
After receiving a wake-up packet, the 82574 ignores any subsequent wake-up packets
until the software device driver clears all of the Received bits in the WUS. It also
ignores link change events until the software device driver clears the Link Status
Changed (LNKC) bit in the WUS.
Wake-Up Packets
The 82574L supports various wake-up packets using two types of filters:
Each of these filters are enabled if the corresponding bit in the WUFC is set to 1b.
• Reception of a Magic Packet*.
• Reception of a network wake-up packet.
• Detection of a link change of state.
• The software device driver programs the WUFC to indicate the packets it needs to
• The operating system (at configuration time) writes a 1b to the PME_EN bit of the
• Sets the PME_Status bit in the PMCSR.
• If the PME_En bit in the PMCSR is set, asserts PE_WAKE_N.
• Stores the first 128 bytes of the packet in the WPM.
• Sets one or more of the Received bits in the WUS. (the 82574 set more than one
• Pre-defined filters
• Flexible filters
use to indicate wake up and supplies the necessary data to the Ipv4/v6 Address
Table (IP4AT, IP6AT) and the Flexible Filter Mask Table (FFMT), Flexible Filter
Length Table (FFLT), and the Flexible Filter Value Table (FFVT). It can also set the
Link Status Change Wake Up Enable (LNKC) bit in the WUFC to cause a wake up
when the link changes state.
PMCSR (bit 8).
bit if a packet matches more than one filter.)
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