GD82551IT S L77C Intel, GD82551IT S L77C Datasheet - Page 38

• Manufacturer Part Number: GD82551IT S L77C
• Manufacturer: Intel

Specifications of GD82551IT S L77C

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 196
• Lead Free Status / RoHS Status: Not Compliant

82551IT — Networking Silicon
5.5.1
5.6
32
Table 12. 82551IT EEPROM Address Map
Note: Refer to the 82551QM/ER/IT EEPROM Map and Programming Information for more details.
EEPROM Address Map
Table 12
10/100 Mbps CSMA/CD Unit
The 82551IT CSMA/CD unit implements both the IEEE 802.3 Ethernet 10 Mbps and IEEE 802.3u
Fast Ethernet 100 Mbps standards. It performs all the CSMA/CD protocol functions such as
transmission, reception, collision handling, etc. The 82551IT CSMA/CD unit communicates with
the internal PHY unit through a standard Media Independent Interface (MII), as specified by IEEE
802.3, Chapter 22. This is a 10/100 Mbps mode in which the data stream is nibble-wide and the
serial clocks run at either 25 or 2.5 MHz.
0Dh:0Fh
40h:FEh
10h:22h
24h:2Fh
30h:33h
34h:3Eh
Word
0Ah
0Bh
0Ch
3Fh
FFh
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
23h
lists the EEPROM address map for the 82551IT Fast Ethernet Controller.
256-word EEPROM Checksum, high byte
64-word EEPROM Checksum, high byte
Ethernet Individual Address Byte 2
Ethernet Individual Address Byte 4
Ethernet Individual Address Byte 6
Secondary PHY Record, high byte
Primary PHY Record, high byte
Subsystem_Vendor, high byte
Subsystem_ID, high byte
EEPROM_ID, high byte
High Byte (Bits 15:8)
Device ID, high byte
Compatibility Byte 1
Controller Type
PWA Byte 1
PWA Byte 3
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
256-word EEPROM Checksum, low byte
64-word EEPROM Checksum, low byte
Ethernet Individual Address Byte 1
Ethernet Individual Address Byte 3
Ethernet Individual Address Byte 5
Secondary PHY Record, low byte
Primary PHY Record, low byte
Subsystem_Vendor, low byte
Subsystem_ID, low byte
EEPROM_ID, low byte
Low Byte (Bits 7:0)
Compatibility Byte 0
Device ID, low byte
PWA Byte 2
PWA Byte 4
Connectors
Datasheet