FW82801DB S L66K Intel, FW82801DB S L66K Datasheet - Page 266

• Manufacturer Part Number: FW82801DB S L66K
• Manufacturer: Intel

Specifications of FW82801DB S L66K

• Lead Free Status / RoHS Status: Supplier Unconfirmed

LAN Controller Registers (B1:D8:F0)
7.2.3
7.2.4
266
System Control Block General Pointer Register
Offset Address:
Default Value:
PORT Register
Offset Address:
Default Value:
The PORT interface allows the processor to reset the ICH4’s internal LAN controller, or perform
an internal self test. The PORT DWORD may be written as a 32-bit entity, two 16-bit entities, or
four 8-bit entities. The LAN controller will only accept the command after the high byte (offset
0Bh) is written; therefore, the high byte must be written last.
15:0
31:4
Bit
Bit
3:0
SCB General Pointer — R/W. The SCB General Pointer register is programmed by software to
point to various data structures in main memory depending on the current SCB Command word.
Pointer Field — R/W (special). A 16-byte aligned address must be written to this field when issuing
a Self-Test command to the PORT interface.The results of the Self Test will be written to the
address specified by this field.
PORT Function Selection — R/W (special). Valid values are listed below. All other values are
Reserved.
0000 = PORT Software Reset: Completely resets the LAN controller (all CSR and PCI registers).
0001 = Self Test: The Self-Test begins by issuing an internal Selective Reset followed by a
0010 = Selective Reset: Sets the CU and RU to the Idle state, but otherwise maintains the current
This command should not be used when the device is active. If a PORT Software Reset is
desired, software should do a Selective Reset (described below), wait for the PORT
register to be cleared (completion of the Selective Reset), and then issue the PORT
Software Reset command. Software should wait approximately 10 s after issuing this
command before attempting to access the LAN controller’s registers again.
general internal self-test of the LAN controller. The results of the self-test are written to
memory at the address specified in the Pointer field of this register. The format of the self-
test result is shown in
memory, the LAN controller will execute a full internal reset and will re-initialize to the
default configuration. Self-Test does not generate an interrupt of similar indicator to the
host processor upon completion.
configuration parameters (RU and CU Base, HDSSize, Error Counters, Configure
information and Individual/Multicast Addresses are preserved). Software should wait
approximately 10 s after issuing this command before attempting to access the LAN
controller’s registers again.
04
0000 0000h
08
0000 0000h
–
–
07h
0Bh
Table
7-5. After completing the self-test and writing the results to
Description
Description
Attribute:
Size:
Attribute:
Size:
Intel
R/W
32 bits
R/W (special)
32 bits
®
82801DB ICH4 Datasheet