GD82559C S L3DF Intel, GD82559C S L3DF Datasheet - Page 76

• Manufacturer Part Number: GD82559C S L3DF
• Manufacturer: Intel

Specifications of GD82559C S L3DF

• Lead Free Status / Rohs Status: Not Compliant

82559 — Networking Silicon
8.2.4
8.2.5
8.2.6
8.2.7
8.2.8
8.2.9
68
Table 14. Modem Revision Register
Modem Revision ID Register
The Modem Revision ID register is a Dword, read only field. It is composed of the Revision ID
byte and a 24-bit Class Code register. Its value is loaded from the EEPROM. The Class Code
identifies the function as a modem. The Class Code and Revision ID are listed in the table below.
Modem Header Type Register
The Modem Header Type field is a byte wide, read only register. It indicates that this is a
multifunction card and a value of 80H is hard coded in the silicon.
Modem I/O Base Address Register
The Modem I/O BAR is a Dword register that specifies the I/O base address for accessing the
82559’s modem. The required I/O space is 8 bytes.
Modem Memory Base Address Register
The Modem Memory BAR is a Dword register that specifies the memory base address for
accessing the 82559’s modem port. The required memory space is 512 bytes. The memory space is
used for both control registers and CIS mapping.
Modem CardBus CIS Pointer
The CIS pointer is a Dword, hard coded, read only register. The CIS pointer indicates whether or
not the CIS structure is located in the memory address space. The physical location of the CIS
structure is in the serial EEPROM. The EEPROM format is described in
EEPROM
Modem Subsystem Vendor ID Register
The Modem Subsystem Vendor ID is a 16 bit read only register. Its value is loaded from the
EEPROM and is a reflection of register 2CH in Function 0, LAN (Ethernet) function.
31:24
23:16
15:8
7:0
Bits
07H
00H
02H
XXH
Default
Interface.”
31:4
3:0
Bits
Read Only
Read Only
Read Only
Read Only
Read/Write
R
R
R/W
0010H
2H
Base Class. This indicates that the 82559 is a communication device.
Subclass. This indicates the serial controller equals 00H.
Program Interface. This indicates that the 82559 is 16550 UART
compatible and initialized by EEPROM word FEH.
Revision Number. This indicates the revision number and is initialized
by EEPROM word FEH.
Default
Modem CIS Pointer (above the control registers)
CIS in the Memory Base Address Register
Description
Description
Section 4.7, “Serial
Datasheet