WG82574IT S LBAB Intel, WG82574IT S LBAB Datasheet - Page 261
WG82574IT S LBAB
Manufacturer Part Number
WG82574IT S LBAB
Description
Manufacturer
Intel
Datasheet
1.WG82574IT_S_LBAB.pdf
(472 pages)
Specifications of WG82574IT S LBAB
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
64
Lead Free Status / RoHS Status
Compliant
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Programing Interface—82574 GbE Controller
9.1.6
9.1.6.1
Table 74.
9.1.6.1.1
9.1.6.1.2
9.1.6.1.3
PCIe Configuration Registers
PCIe provides two mechanisms to support native features:
Initialization values of the configuration registers are marked in parenthesis.
PCIe Capability Structure
The 82574 implements the PCIe capability structure for end-point devices as listed in
Table
PCIe Configuration Registers
Capability ID, Offset 0xE0, (RO)
This field equals 0x10 indicating the linked list item as being the PCIe Capabilities
registers.
Next Pointer, Offset 0xE1, (RO)
Offset to the next capability item in the capability list. A value of 0xA0 points to the
MSI-X capability.
PCI Express CAP, Offset 0xE2, (RO)
The PCIe capabilities register identifies PCIe device type and associated capabilities.
This is a read-only register.
3:0
7:4
8
13:9
15:14
• PCIe defines a PCIe capability pointer indicating support for PCIe.
• PCIe extends the configuration space beyond the 256 bytes available for PCI to
Byte Offset
Bits
4096 bytes.
0xEC
0xE0
0xE4
0xE8
0xF0
74:
0001b
0000b
0b
00000b
00b
Default
RO
RO
RO
RO
RO
R/W
Byte 3
PCIe Capability Register
Device Status
Capability Version
Indicates the PCIe capability structure version number 1.
Device/Port Type
Indicates the type of PCIe functions. LAN function in the 82574 is a native
PCIe functions with a value of 0000b.
Slot Implemented
The 82574 does not implement slot options therefore this field is hardwired to
0b.
Interrupt Message Number
The 82574 does not implement multiple MSI per function, therefore this field
is hardwired to 0x0.
Reserved
Link Status
Byte 2
Device Capability
Link Capability
Description
Next Pointer
Byte 1
Device Control
Link Control
Capability ID
Byte 0
261
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