82NM10 Datasheet, PDF (40/671 Pages) Intel Corporation – Intel® NM10 Family Express Chipset

Introduction
LAN Controller
Intel NM10 Express Chipset’s integrated LAN controller includes a 32-bit PCI controller
that provides enhanced scatter-gather bus mastering capabilities and enables the LAN
controller to perform high speed data transfers over the PCI bus. 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 transmit and receive FIFOs of 3 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 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.
Alert Standard Format (ASF) Management Controller
Intel NM10 Express Chipset integrates an Alert Standard Format controller in addition
to the integrated LAN controller, allowing interface system-monitoring devices to
communicate through the integrated LAN controller to the network. This makes remote
manageability and system hardware monitoring possible using ASF.
The ASF controller can collect and send various information from system components
such as the processor, chipset, BIOS and sensors on the motherboard to a remote
server running a management console. The controller can also be programmed to
accept commands back from the management console and execute those commands
on the local system.
RTC
Intel NM10 Express Chipset 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 Intel NM10 Express Chipset
configuration.
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Datasheet