NH82801HBM S LB9A Intel, NH82801HBM S LB9A Datasheet - Page 52

• 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

Introduction
Advanced Programmable Interrupt Controller (APIC)
In addition to the standard ISA compatible Programmable Interrupt controller (PIC)
described in the previous section, the ICH8 incorporates the Advanced Programmable
Interrupt Controller (APIC).
Universal Serial Bus (USB) Controllers
The ICH8 contains up to two Enhanced Host Controller Interface (EHCI) host controllers
that support USB high-speed signaling. High-speed USB 2.0 allows data transfers up to
480 Mb/s which is 40 times faster than full-speed USB. The ICH8 also contains up to
five Universal Host Controller Interface (UHCI) controllers that support USB full-speed
and low-speed signaling.
The ICH8 supports up to ten USB 2.0 ports. All ten ports are high-speed, full-speed,
and low-speed capable. ICH8’s port-routing logic determines whether a USB port is
controlled by one of the UHCI or EHCI controllers. See
Section 5.18
and
Section 5.19
for details.
Gigabit Ethernet Controller
The Gigabit Ethernet Controller provides a system interface via a PCI function. The
controller provides a full memory-mapped or IO mapped interface along with a 64 bit
address master support for systems using more than 4 GB of physical memory and
DMA (Direct Memory Addressing) mechanisms for high performance data transfers. Its
bus master capabilities enable the component to process high-level commands and
perform multiple operations; this lowers processor utilization by off-loading
communication tasks from the processor. Two large configurable transmit and receive
FIFOs (up to 16 KB each) help prevent data underruns and overruns while waiting for
bus accesses. This enables the integrated LAN controller to transmit data with
minimum interframe spacing (IFS).
The LAN controller can operate at multiple speeds (10/100/1000 Mb/s) and in either
full duplex or half duplex mode. In full duplex mode the LAN controller adheres with the
IEEE 802.3x Flow Control Specification. Half duplex performance is enhanced by a
proprietary collision reduction mechanism. See
Section 5.3
for details.
RTC
The ICH8 contains a Motorola MC146818A-compatible real-time clock with 256 bytes of
battery-backed RAM. The real-time clock performs two key functions: keeping track of
the time of day and storing system data, even when the system is powered down. The
RTC operates on a 32.768 KHz crystal and a 3 V battery.
The RTC also supports two lockable memory ranges. By setting bits in the configuration
space, two 8-byte ranges can be locked to read and write accesses. This prevents
unauthorized reading of passwords or other system security information.
The RTC also supports a date alarm that allows for scheduling a wake up event up to
30 days in advance, rather than just 24 hours in advance.
GPIO
Various general purpose inputs and outputs are provided for custom system design.
The number of inputs and outputs varies depending on ICH8 configuration.
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Intel
ICH8 Family Datasheet