NH82801HBM S LB9A Intel, NH82801HBM S LB9A Datasheet - Page 584

• Manufacturer Part Number: NH82801HBM S LB9A
• Description: CONTROLLER HUB, ICH8M, I/O, 82801HBM
• Manufacturer: Intel

Specifications of NH82801HBM S LB9A

• Power Dissipation Pd: 2.4W
• Digital Ic Case Style: BGA
• No. Of Pins: 676
• Pci Bus Type: I/O Controller Hub
• Pci Express Base Spec: PCIe 1.1
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

584
Bit
2
1
0
Port Enabled/Disabled (PORT_EN) — R/W. Ports can be enabled by host software
only. Ports can be disabled by either a fault condition (disconnect event or other fault
condition) or by host software. Note that the bit status does not change until the port
state actually changes and that there may be a delay in disabling or enabling a port if
there is a transaction currently in progress on the USB.
0 = Disable
1 = Enable
Connect Status Change — R/WC. This bit indicates that a change has occurred in the
port’s Current Connect Status (see bit 0). The hub device sets this bit for any changes
to the port device connect status, even if system software has not cleared a connect
status change. If, for example, the insertion status changes twice before system
software has cleared the changed condition, hub hardware will be setting” an already-
set bit (i.e., the bit will remain set). However, the hub transfers the change bit only
once when the host controller requests a data transfer to the Status Change endpoint.
System software is responsible for determining state change history in such a case.
0 = No change. Software clears this bit by writing a 1 to it.
1 = Change in Current Connect Status.
Current Connect Status — RO. This value reflects the current state of the port, and
may not correspond directly to the event that caused the Connect Status Change bit
(Bit 1) to be set.
0 = No device is present.
1 = Device is present on port.
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Description
UHCI Controllers Registers
Intel
®
ICH8 Family Datasheet