FW82801DB S L66K Intel, FW82801DB S L66K Datasheet - Page 424

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

Specifications of FW82801DB S L66K

• Lead Free Status / RoHS Status: Supplier Unconfirmed

EHCI Controller Registers (D29:F7)
12.1.17
12.1.18
424
NXT_PTR1—Next Item Pointer #1 Register
(USB EHCI—D29:F7)
Address Offset:
Default Value:
PWR_CAP—Power Management Capabilities Register
(USB EHCI—D29:F7)
Address Offset:
Default Value:
NOTES:
1. Normally, this register is read-only to report capabilities to the power management software. To report
2. Reset: core well, but not D3-to-D0 warm reset.
15:11
Bit
7:0
Bit
8:6
2:0
different power management capabilities, depending on the system in which the ICH4ICH4 is used, bits 15:11
and 8:6 in this register are writable when the WRT_RDONLY bit is set. The value written to this register does
not affect the hardware other than changing the value returned during a read.
10
9
5
4
3
Next Item Pointer #1 Value — R/W-Special. This register defaults to 58h, which indicates that the
next capability registers begin at configuration offset 58h. This register is writable when the
WRT_RDONLY bit is set. This allows BIOS to effectively hide the Debug Port capability registers, if
necessary. This register should only be written during system initialization before the plug-and-play
software has enabled any master-initiated traffic. Only values of 58h (Debug Port visible) and 00h
(Debug Port invisible) are expected to be programmed in this register.
PME Support — R/W-Special. This 5-bit field indicates the power states in which the function may
assert PME#. The ICH4 EHC does not support the D1 or D2 states. For all other states, the ICH4
EHC is capable of generating PME#. Software should never need to modify this field.
D2 Support — R/W-Special.
0 = D2 State is not supported
1 = D2 State is supported
D1 Support — R/W-Special.
0 = D1 State is not supported
1 = D1 State is supported
Auxiliary Current — R/W-Special. The ICH4 EHC reports 375 mA maximum Suspend well current
required when in the D3cold state. This value can be written by BIOS when a more accurate value is
known.
DSI — R/W-Special. The ICH4 reports 0, indicating that no device-specific initialization is required.
Reserved
PME Clock — R/W-Special. The ICH4 reports 0, indicating that no PCI clock is required to generate
PME#.
Version — R/W-Special. The ICH4 reports 010b, indicating that it complies with Revision 1.1 of the
PCI Power Management Specification.
51h
58h
52
C9C2h
–
53h
Description
Description
Attribute:
Size:
Attribute:
Size:
R/W-Special
8 bits
R/W-Special
16 bits
Intel
®
82801DB ICH4 Datasheet