WG82574IT S LBAC Intel, WG82574IT S LBAC Datasheet - Page 128

• Manufacturer Part Number: WG82574IT S LBAC
• Description: CONTROLLER, ENET, INTEL 82574IT, 64PQFN
• Manufacturer: Intel

Specifications of WG82574IT S LBAC

• Ethernet Type: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: -40°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

7.0
7.1
Note:
7.1.1
Note:
128
Inline Functions
Packet Reception
Packet reception consists of recognizing the presence of a packet on the wire,
performing address filtering, storing the packet in the receive data FIFO, transferring
the data to one of the two receive queues in host memory, and updating the state of a
receive descriptor.
The maximum supported received packet size is 9018 bytes.
Packet Address Filtering
Hardware stores incoming packets in host memory subject to the following filter
modes. If there is insufficient space in the receive FIFO, hardware drops them and
indicates the missed packet in the appropriate statistics registers.
The following filter modes are supported:
The software device driver can only use 15 entries (entries 0-14). Entry 15 should be
kept untouched by the software device driver. It can be used only by manageability's
firmware or an external Manageability Controller (MC).
The upper bits of the incoming packet's destination address index is a bit vector that
indicates whether to accept the packet; if the bit in the vector is one, accept the
packet, otherwise, reject it. The 82574L provides a 4096-bit vector. Software provides
four choices of which bits are used for indexing. These are [47:36], [46:35], [45:34],
or [43:32] of the internally stored representation of the destination address (see
Figure
Receive all VLAN packets that are for this station and have the appropriate bit set in the
VLAN filter table. A detailed discussion and explanation of VLAN packet filtering is
contained in
Normally, only good packets are received.
• Exact unicast/multicast
• Promiscuous unicast
• Multicast
• Promiscuous multicast
• VLAN
— The destination address must exactly match one of 16 stored addresses. These
— Receive all unicasts
— Receive all multicast packets
65)
addresses can be unicast or multicast.
section
7.5.3.
82574 GbE Controller—Inline Functions