WG82574L S LBA8 Intel, WG82574L S LBA8 Datasheet - Page 275
WG82574L S LBA8
Manufacturer Part Number
WG82574L S LBA8
Description
Manufacturer
Intel
Datasheet
1.WG82574L_S_LBA8.pdf
(472 pages)
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
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Driver Programing Interface—82574 GbE Controller
10.1.1.5.3
10.1.2
Note:
Undefined I/O Offsets
I/O offsets 0x08 through 0x1F are considered to be reserved offsets with the I/O
window. Dword reads from these addresses return 0xFFFF; writes to these addresses
are discarded.
Registers Byte Ordering
This section defines the structure of registers that contain fields carried over the
network. Some examples are L2, L3, L4 fields.
The following example is used to describe byte ordering over the wire (hex notation):
where each byte is sent with the Least Significant Bit (LSB) first. That is, the bit order
over the wire for this example is
The general rule for register ordering is to use host ordering. Using the previous
example, a 6-byte fields (such as, MAC address) is stored in a CSR in the following
manner:
The following exceptions use network ordering. Using the previous example, a 16-bit
field (such as, EtherType) is stored in a CSR in the following manner:
The following exception uses network ordering:
The normal notation as it appears in text books, etc. is to use network ordering.
Example: Suppose a MAC address of 00-A0-C9-00-00-00. The order on the network is
00, then A0, then C9, etc. However, the host ordering presentation is:
• All ETherType fields
Dword address (N+4)
DW address (N+4)
or (WORD aligned)
Dword address (N)
DW address (N)
(DW aligned)
Last
..., 06
....
Last
05
0000 0011
Byte 3
Byte 3
Byte 3
0x03
0x00
00
04
...
...
0000 0010
03
Byte 2
Byte 2
Byte 2
0x02
0x01
C9
...
...
02
0000 0001
Byte 1
Byte 1
Byte 1
0x01
0x05
0x01
A0
00
01
...
0000 0000
First
First
00
Byte 0
Byte 0
Byte 0
0x00
0x04
0x00
00
00
...
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