WG82574L S LBA8 Intel, WG82574L S LBA8 Datasheet - Page 178

• Manufacturer Part Number: WG82574L S LBA8
• Manufacturer: Intel

Specifications of WG82574L S LBA8

• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: 0C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / RoHS Status: Compliant

Note:
Table 42.
Note:
7.6
178
The Virtual LAN ID field indexes a 4096 bit vector. If the indexed bit in the vector is
one; there is a virtual LAN match. Software might set the entire bit vector to ones if the
node does not implement 802.1q filtering. The register description of the VLAN filter
table array is described in detail in
In summary, the 4096-bit vector is comprised of 128, 32-bit registers. Matching to this
bit vector follows the same algorithm as indicated in
filtering. The VLAN Identifier (VID) field consists of 12 bits. The upper 7 bits of this field
are decoded to determine the 32-bit register in the VLAN filter table array to address
and the lower 5 bits determine which of the 32 bits in the register to evaluate for
matching.
Two other bits in the Receive Control register (see
are also used in conjunction with 802.1q VLAN filtering operations. CFIEN enables the
comparison of the value of the CFI bit in the 802.1q packet to the Receive Control
register CFI bit as acceptance criteria for the packet.
The VFE bit does not effect whether the VLAN tag is stripped. It only affects whether
the VLAN packet passes the receive filter.
Table 42
Packet Reception Decision Table
A packet is defined as a VLAN/802.1q packet if its type field matches the VET.
LED's
The 82574 implements three output drivers intended for driving external LED circuits
per port. Each of the three LED outputs can be individually configured to select the
particular event, state, or activity, which is indicated on that output. In addition, each
LED can be individually configured for output polarity as well as for blinking versus non-
blinking (steady-state) indication.
The configuration for LED outputs is specified via the LEDCTL register. Furthermore, the
hardware-default configuration for all the LED outputs, can be specified via NVM fields,
thereby supporting LED displays configurable to a particular OEM preference.
No
Yes
Yes
Yes
Yes
802.1q?
packet
Is
lists reception actions per control bit settings.
X
0b
0b
1b
1b
CTRL.
VME
X
0b
1b
0b
1b
RCTL.
VFE
Normal packet reception.
Receive a VLAN packet if it passes the standard filters (only).
Leave the packet as received in the data buffer. VP bit in receive
descriptor is cleared.
Receive a VLAN packet if it passes the standard filters and the
VLAN filter table. Leave the packet as received in the data buffer
(for example, the VLAN tag would not be stripped). VP bit in
receive descriptor is cleared.
Receive a VLAN packet if it passes the standard filters (only). Strip
off the VLAN information (four bytes) from the incoming packet
and store in the descriptor. Sets the VP bit in receive descriptor.
Receive a VLAN packet if it passes the standard filters and the
VLAN filter table. Strip off the VLAN information (four bytes) from
the incoming packet and store in the descriptor. Sets the VP bit in
receive descriptor.
section
10.2.5.24.
Action
section
section 7.1.1
82574 GbE Controller—Inline Functions
10.2.5.1), CFIEN and CFI,
for multicast address