82545GM Datasheet, PDF (1/2 Pages) Intel Corporation – Intel® 82545GM Gigabit Ethernet Controller

Product Brief
Intel^® 82545GM Gigabit Ethernet Controller
High-Performance Gigabit Connectivity
Intel in
Communications
Product Overview
The Intelligent Way to Connect
I _{Footprint compatibility allows for flexible designs}
I _{Reduced power usage and heat generation for}
lower system costs and higher density
I _{Enhanced manageability and system health}
monitoring with ASF 1.0 and SMBus 2.0
The Intel^® 82545GM Gigabit Ethernet Controller
incorporates integrated Gigabit Ethernet MAC
and PHY layer functions and Serializer/Deserializer
(SerDes) in a single, compact component.
Packaged in a 21x21mm TFBGA, the Intel
82545GM Gigabit Ethernet Controller is physically
and electrically compatible with the Intel^® 82546GB
Dual Port Gigabit Ethernet Controller, allowing for a
flexible, single-port or dual-port, multipurpose design.
The Intel 82545GM integrates Intel’s fourth-
generation Gigabit MAC design with fully
integrated, physical-layer circuitry to provide a
standard IEEE 802.3 Ethernet interface for
1000BASE-T, 100BASE-TX, and 10BASE-T
applications (802.3, 802.3u, 802.3ab). For Ethernet
on the backplane and fiber-optic applications, the
Intel 82545GM’s integrated SerDes supports
1000BASE-X (802.3z). In addition, the controller
provides a direct Peripheral Component
Interconnect (PCI) 2.3 and PCI-X 1.0a compliant
bus at clock frequencies up to 133MHz.
The Intel 82545GM on-board SMBus port enables
enhanced manageability and system health
monitoring via the LAN: management packets can
be routed to or from a management processor.
The SMBus port enables implementation of
industry standards such as IPMI (Intelligent
Platform Management Interface). In addition, ASF
1.0 (Alert Standard Format) circuitry provides
alerting and remote-control capabilities with
standardized interfaces.
The Intel 82545GM Gigabit Ethernet Controller
architecture is optimized to deliver both high-
performance networking and PCI/PCI-X bus
efficiency. Using state-logic design with a pipelined
DMA Unit and 128-bit-wide buses for the fastest
performance, the 82545GM controller handles
Gigabit Ethernet traffic with low network latency
and minimal internal processing overhead. The
controller’s architecture includes independent
transmit and receive queues to limit PCI bus traffic,
and a PCI interface that maximizes the use of
bursts for efficient bus usage. The Intel 82545GM
Gigabit Ethernet Controller prefetches up to 64
packet descriptors in a single burst for efficient
PCI-bandwidth usage. A 64KB on-chip packet
buffer maintains superior performance as available
PCI bandwidth changes. Advanced interrupt
moderation hardware manages interrupts
generated by the 82545GM controller to further
improve system efficiency. In addition, using
hardware acceleration, the controller also offloads
tasks from the host processor, such as
TCP/UDP/IP checksum calculations and TCP
segmentation.
Applications
The Intel 82545GM Gigabit Ethernet Controller
is designed for use in the following applications:
I _{LAN on Motherboard (LOM) in dense, space-}
constrained systems such as rack-mounted
servers and high-density blade servers
I _{Communications platform using dual Gigabit}
Ethernet on the backplane (PICMG 3.1
compliant or 1000BASE-X)
I _{Internet infrastructure devices with high-speed}
requirements and limited board real estate, such
as switches, routers and load balancers