FW82801EB Intel, FW82801EB Datasheet - Page 491

• Manufacturer Part Number: FW82801EB
• Manufacturer: Intel

Specifications of FW82801EB

• Lead Free Status / RoHS Status: Not Compliant

13.1.25
13.1.26
Intel
®
82801EB ICH5 / 82801ER ICH5R Datasheet
PWAKE_CAP—Port Wake Capability Register
LEG_EXT_CAP—USB EHCI Legacy Support Extended
(USB EHCI—D29:F7)
Address Offset:
Default Value:
This register is in the suspend power well. The intended use of this register is to establish a policy
about which ports are to be used for wake events. Bit positions 1–8 in the mask correspond to a
physical port implemented on the current EHCI controller. A 1 in a bit position indicates that a
device connected below the port can be enabled as a wake-up device and the port may be enabled
for disconnect/connect or overcurrent events as wake-up events. This is an information-only mask
register. The bits in this register do not affect the actual operation of the EHCI host controller. The
system-specific policy can be established by BIOS initializing this register to a system-specific
value. System software uses the information in this register when enabling devices and ports for
remote wake-up.
Capability Register (USB EHCI—D29:F7)
Address Offset:
Default Value:
Power Well:
31:25
23:17
15:9
15:8
Bit
8:1
Bit
7:0
24
16
0
Reserved — RO.
Port Wake Up Capability Mask — R/W. Bit positions 1 through 8 correspond to a physical port
implemented on this host controller. For example, bit position 1 corresponds to port 1, bit position 2
corresponds to port 2, etc.
Port Wake Implemented — R/W. A 1 in this bit indicates that this register is implemented to
software.
Reserved — RO. Hardwired to 00h
Reserved — RO. Hardwired to 00h
HC OS Owned Semaphore — R/W. System software sets this bit to request ownership of the EHCI
controller. Ownership is obtained when this bit reads as 1 and the HC BIOS Owned Semaphore bit
reads as clear.
HC BIOS Owned Semaphore — R/W. The BIOS sets this bit to establish ownership of the EHCI
controller. System BIOS will clear this bit in response to a request for ownership of the EHCI
controller by system software.
Next EHCI Capability Pointer — RO. Hardwired to 00h to indicate that there are no EHCI Extended
Capability structures in this device.
Capability ID — RO. Hardwired to 01h to indicate that this EHCI Extended Capability is the Legacy
Support Capability.
62
01FFh
Suspend
68
00000001h
–
–
63h
6Bh
Description
Description
Attribute:
Size:
Attribute:
Size:
EHCI Controller Registers (D29:F7)
R/W
16 bits
R/W, RO
32 bits
491