WG82574L S LBA8 Intel, WG82574L S LBA8 Datasheet - Page 295

• 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

Driver Programing Interface—82574 GbE Controller
10.2.2.10
Note:
10.2.2.11
10.2.2.12
Note:
Flow Control Type - FCT (0x00030; RW)
This register contains the type field hardware uses to recognize a flow control packet.
Only the lower 16 bits of this register have meaning. This register should be
programmed with 0x88_08. The upper byte is first on the wire FCT[15:8].
At the time of the original implementation, the flow control type field was not defined
and thus hardware provided programmability. Since then, the final release of the
802.3x standard has specified the type/length value for MAC control frames as 88-08.
VLAN Ether Type - VET (0x00038; RW)
This register contains the type field hardware uses to recognize an 802.1Q (VLAN)
Ethernet packet. To be compliant with the 802.3ac standard, this register should be
programmed with the value 0x8100. For VLAN transmission the upper byte is first on
the wire (VET[15:8]).
Flow Control Transmit Timer Value - FCTTV (0x00170; RW)
The 16-bit value in the TTV field is inserted into a transmitted frame (either XOFF
frames or any pause frame value in any software transmitted packets). It counts in
units of slot time. If software needs to send an XON frame, it must set TTV to 0b prior
to initiating the pause frame.
The 82574 uses a fixed slot time value of 64-byte times.
FCT
Reserved
VET
Reserved
TTV
Reserved
Field
Field
Field
15:0
31:16
15:0
31:16
15:0
31:16
Bit(s)
Bit(s)
Bit(s)
X
0x0
0x8100
0x0
X
0x0
Initial
Initial
Initial
Value
Value
Value
Flow Control Type
Reserved
Reads as 0x0
VLAN Ether Type
Reserved
Reads as 0x0.
Transmit Timer Value
Included in XOFF frame.
Reads as 0x0.
Should be written to 0x0 for future compatibility.
Description
Description
Description
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