FW82801EB S L73Z Intel, FW82801EB S L73Z Datasheet - Page 293
FW82801EB S L73Z
Manufacturer Part Number
FW82801EB S L73Z
Description
Manufacturer
Intel
Datasheet
1.FW82801EB_S_L73Z.pdf
(671 pages)
Specifications of FW82801EB S L73Z
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7.2.6
7.2.7
Intel
®
82801EB ICH5 / 82801ER ICH5R Datasheet
MDI_CNTL—Management Data Interface (MDI) Control
Register (LAN Controller—B1:D8:F0)
Offset Address:
Default Value:
The Management Data Interface (MDI) Control register is a 32-bit field and is used to read and
write bits from the LAN Connect component. This register 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 13h) is written; therefore, the high byte must be written last.
REC_DMA_BC—Receive DMA Byte Count Register
(LAN Controller—B1:D8:F0)
Offset Address:
Default Value:
31:30
27:26
25:21
20:16
15:0
31:0
Bit
Bit
29
28
These bits are reserved and should be set to 00b.
Interrupt Enable — R/W (special).
0 = Disable
1 = Enables the LAN controller to assert an interrupt to indicate the end of an MDI cycle.
Ready — R/W (special).
0 = Expected to be reset by software at the same time the command is written.
1 = Set by the LAN controller at the end of an MDI transaction.
Opcode — R/W (special). These bits define the opcode:
00 = Reserved
01 = MDI write
10 = MDI read
11 = Reserved
LAN Connect Address — R/W (special). This field of bits contains the LAN Connect address.
LAN Connect Register Address — R/W (special). This field contains the LAN Connect register
address.
Data — R/W (special). In a write command, software places the data bits in this field, and the LAN
controller transfers the data to the external LAN Connect component. During a read command, the
LAN controller reads these bits serially from the LAN Connect, and software reads the data from this
location.
Receive DMA Byte Count — RO. This field keeps track of how many bytes of receive data have
been passed into host memory via DMA.
10
0000 0000h
14
0000 0000h
–
–
13h
17h
Description
Description
Attribute:
Size:
Attribute:
Size:
LAN Controller Registers (B1:D8:F0)
R/W (special)
32 bits
RO
32 bits
293
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