NH82801HBM S LB9A Intel, NH82801HBM S LB9A Datasheet - Page 209

• 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

Functional Description
5.18.6.2
Intel
®
ICH8 Family Datasheet
Data Buffer Error
This event indicates that an overrun of incoming data or a under-run of outgoing data
has occurred for this transaction. This would generally be caused by the ICH8 not being
able to access required data buffers in memory within necessary latency requirements.
Either of these conditions causes the C_ERR field of the TD to be decremented.
When C_ERR decrements to 0, the Active bit in the TD is cleared, the Stalled bit is set,
the USB Error Interrupt bit in the HC Status register is set to 1 at the end of the frame
and a hardware interrupt is signaled to the system.
Bit Stuff Error
A bit stuff error results from the detection of a sequence of more that six 1s in a row
within the incoming data stream. This causes the C_ERR field of the TD to be
decremented. When the C_ERR field decrements to 0, the Active bit in the TD is cleared
to 0, the Stalled bit is set to 1, the USB Error Interrupt bit in the HC Status register is
set to 1 at the end of the frame and a hardware interrupt is signaled to the system.
Non-Transaction Based Interrupts
If an ICH8 process error or system error occur, the ICH8 halts and immediately issues a
hardware interrupt to the system.
Resume Received
This event indicates that the ICH8 received a RESUME signal from a device on the USB
bus during a global suspend. If this interrupt is enabled in the Interrupt Enable register,
a hardware interrupt is signaled to the system allowing the USB to be brought out of
the suspend state and returned to normal operation.
ICH8 Process Error
The HC monitors certain critical fields during operation to ensure that it does not
process corrupted data structures. These include checking for a valid PID and verifying
that the MaxLength field is less than 1280. If it detects a condition that would indicate
that it is processing corrupted data structures, it immediately halts processing, sets the
HC Process Error bit in the HC Status register and signals a hardware interrupt to the
system.
This interrupt cannot be disabled through the Interrupt Enable register.
Host System Error
The ICH8 sets this bit to 1 when a Parity error, Master Abort, or Target Abort occur.
When this error occurs, the ICH8 clears the Run/Stop bit in the Command register to
prevent further execution of the scheduled TDs. This interrupt cannot be disabled
through the Interrupt Enable register.
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