WG82577LM S LGWS Intel, WG82577LM S LGWS Datasheet - Page 118

• Manufacturer Part Number: WG82577LM S LGWS
• Manufacturer: Intel

Specifications of WG82577LM S LGWS

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Table 16.
9.3.2.2
Note:
9.3.3
9.3.3.1
111
IBA Capabilities
Checksum Word Calculation (Word 0x3F)
The Checksum word (Word 0x3F, NVM bytes 0x7E and 0x7F) is used to ensure that the
base NVM image is a valid image. The value of this word should be calculated such that
after adding all the words (0x00-0x3F) / bytes (0x00-0x7F), including the Checksum
word itself, the sum should be 0xBABA. The initial value in the 16 bit summing register
should be 0x0000 and the carry bit should be ignored after each addition.
Hardware does not calculate the word 0x3F checksum during NVM write; it must be
calculated by software independently and included in the NVM write data. Hardware
does not compute a checksum over words 0x00-0x3F during NVM reads in order to
determine validity of the NVM image; this field is provided strictly for software
verification of NVM validity. All hardware configuration based on word 0x00-0x3F
content is based on the validity of the Signature field of the NVM.
Basic Configuration Software Words
This section describes the meaningful NVM words in the basic configuration space that
are used by software at word addresses 0x03-0x09.
Reserved (Word 0x3)
15:14
13:5
4
3
2
1
0
15:12
11
10:0
Bits
Bit
SIG
Reserved
EFI
Reserved
UNDI
BC
Reserved
LOM
Reserved
Name
Name
0x0
1b
0x00
Default
Signature
These bits must be set to 01b to indicate that this word has been
programmed by the agent or other configuration software.
Reserved, must be set to 0x00.
iSCSI boot capability not present (0b default).
EFI EBC capability is present in Flash.
0b = The EFI code is not present (default).
1b = The EFI code is present.
Reserved, set to 1b.
PXE/UNDI capability is present in Flash.
1b = The PXE base code is present (default).
0b = The PXE base code is not present.
PXE base code is present in Flash.
0b = The PXE base code is present (default).
1b = The PXE base code is not present.
Reserved, set to 0x0.
LOM
Set to 1b.
Reserved, set to 0x00.
82577 GbE PHY—Non-Volatile Memory (NVM)
Description
Description