NH82801GHM S L8YR Intel, NH82801GHM S L8YR Datasheet - Page 562
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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
Lead Free Status / RoHS Status
Compliant
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13.2.1.2
13.2.1.3
Note:
562
HCIVERSION—Host Controller Interface Version Number
Register
Offset:
Default Value:
HCSPARAMS—Host Controller Structural Parameters
Offset:
Default Value:
This register is reset by a suspend well reset and not a D3-to-D0 reset or HCRESET.
NOTE: This register is writable when the WRT_RDONLY bit is set.
31:24
23:20
19:16
15:12
15:0
11:8
7:4
3:0
Bit
Bit
Host Controller Interface Version Number — RO. This is a two-byte register containing a
BCD encoding of the version number of interface that this host controller interface
conforms.
Reserved — RO. Default=0h.
Debug Port Number (DP_N) — RO (special). Hardwired to 1h indicating that the Debug
Port is on the lowest numbered port on the Intel
Reserved
Number of Companion Controllers (N_CC) — R/W (special). This field indicates the
number of companion controllers associated with this USB EHCI host controller.
A 0 in this field indicates there are no companion host controllers. Port-ownership hand-
off is not supported. Only high-speed devices are supported on the host controller root
ports.
A value of 1 or more in this field indicates there are companion USB UHCI host
controller(s). Port-ownership hand-offs are supported. High, Full- and Low-speed
devices are supported on the host controller root ports.
The ICH7 allows the default value of 4h to be over-written by BIOS. When removing
classic controllers, they should be disabled in the following order: Function 3, Function
2, Function 1, and Function 0, which correspond to ports 7:6, 5:4, 3:2, and 1:0,
respectively.
Number of Ports per Companion Controller (N_PCC) — RO. Hardwired to 2h. This field
indicates the number of ports supported per companion host controller. It is used to
indicate the port routing configuration to system software.
Reserved. These bits are reserved and default to 0.
N_PORTS — R/W (special). This field specifies the number of physical downstream
ports implemented on this host controller. The value of this field determines how many
port registers are addressable in the Operational Register Space. Valid values are in the
range of 1h to Fh.
The ICH7 reports 8h by default. However, software may write a value less than 8 for
some platform configurations. A 0 in this field is undefined.
MEM_BASE + 02h
0100h
MEM_BASE + 04h
00104208h
–
–
03h
07h
Description
Description
Attribute:
Size:
Attribute:
Size:
®
ICH7.
EHCI Controller Registers (D29:F7)
Intel
RO
16 bits
R/W (special), RO
32 bits
®
ICH7 Family Datasheet
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