NH82801GHM S L8YR Intel, NH82801GHM S L8YR Datasheet - Page 322
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NH82801GHM S L8YR
Manufacturer Part Number
NH82801GHM S L8YR
Description
Manufacturer
Intel
Datasheet
1.NH82801GHM_S_L8YR.pdf
(848 pages)
Specifications of NH82801GHM S L8YR
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Compliant
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8.2.6
8.2.7
322
MDI_CNTL—Management Data Interface (MDI) Control
Register (LAN Controller—B1:D8:F0)
Offset Address: 10h
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: 14h
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
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.
cycle.
0000 0000h
0000 0000h
–
–
13h
17h
LAN Controller Registers (B1:D8:F0) (Desktop and Mobile Only)
Description
Description
Attribute:
Size:
Attribute:
Size:
Intel
R/W (special)
32 bits
RO
32 bits
®
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