82576EB Datasheet, PDF (17/34 Pages) Intel Corporation – LAN Access Division

Intel^® 82576EB GbE Controller - Specification Changes
Through the course of hardware ECOs, the suffix field is incremented. The purpose of this
information is to enable customer support (or any user) to identify the revision level of a
product.
Network driver software should not rely on this field to identify the product or its
capabilities.
PBA numbers have exceeded the length that can be stored as HEX values in two words.
For newer NICs, the high word in the PBA Number Module is a flag (0xFAFA) indicating
that the actual PBA is stored in a separate PBA block. The low word is a pointer to the
starting word of the PBA block.
The following shows the format of the PBA Number Module field for new products.
PBA Number
Word 0x8
Word 0x9
G23456-003
FAFA
Pointer to PBA Block
The following provides the format of the PBA block; pointed to by word 0x9 above:
Word Offset
Description
0x0
0x1 ... 0x5
Length in words of the PBA Block (default is 0x6)
PBA Number stored in hexadecimal ASCII values.
The new PBA block contains the complete PBA number and includes the dash and the first
digit of the 3-digit suffix which were not included previously. Each digit is represented by
its hexadecimal-ASCII values.
The following shows an example PBA number (in the new style):
PBA Number
G23456-003
Word
Offset 0
0006
Specifies 6
words
Word
Offset 1
4732
G2
Word
Offset 2
3334
34
Word
Offset 3
3536
56
Word
Offset 4
Word
Offset 5
2D30
3033
-0
03
Older NICs have PBA numbers starting with [A,B,C,D,E] and are stored directly in words
0x8-0x9. The dash in the PBA number is not stored; nor is the first digit of the 3-digit
suffix (the first digit is always 0b for older products).
The following example shows a PBA number stored in the PBA Number Module field (in
the old style):
PBA Number
Byte 1
E23456-003
E2
▼ Return to Summary
Byte 2
34
Byte 3
56
Byte 4
03
Revision: 2.85
September 2012
Intel^® 82576EB GbE Controller
Specification Update
17