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Intel in Communications

Product Brief ® Intel 82551IT Integrated 10BASE-T/100BASE-TX Ethernet Controller Integrated functions for high-performance, embedded Ethernet applications The Intelligent Way to Connect � High-performance/low-cost solution � Advanced offloading features speed data transfers � Footprint compatibility for flexible designs Product Description ® The Intel 82551IT Integrated 10BASE-T/ 100BASE-TX Ethernet Controller expands the ® family of Intel 8255x controllers. As part of Intel’s fourth generation of fully integrated Fast Ethernet MAC/PHY solutions, the 82551IT is optimized for low-cost, embedded applications. The 82551IT provides excellent performance with offloading of TCP, UDP and IP checksums. Its optimized 32-bit interface and efficient scatter- gather bus mastering capabilities enable the controller to perform high-speed data transfers over the PCI bus. These capabilities accelerate the processing of high-level commands and operations, lowering CPU utilization. The device’s architecture enables efficient data flow from the bus interface unit to the 3KB transmit and receive FIFOs, providing the perfect balance between the wire and system bus. In addition, multiple priority queues augment Quality of Service (QoS) performance. The 82551IT is pin-compatible with the ® Intel 82559ER Fast Ethernet controller, and it ® is layout-compatible with Intel 82540 Gigabit Ethernet controller. Intel-supported 82551IT ® drivers run on the standard Intel 82551QM Fast Ethernet PCI/CardBus Controller, providing OEMs an upgrade path to the 82551QM for additional features and increased functionality. Applications The Intel 82551IT Integrated 10BASE-T/ 100BASE-TX Ethernet Controller is designed for use in the following applications: � Information appliances, set-top boxes � Point-of-Sales terminals, Web kiosks � Printers � Other embedded applications Product Brief ® Intel 82551IT Integrated 10BASE-T/100BASE-TX Ethernet Controller Features Performance-enhancement Features � Offloads TCP, UDP, and IP checksums from PC processor � Multiple priority transmit queues � Combination 10/100Mbps Fast Ethernet controller and physical layer � Improved dynamic transmit chaining � Early-receive interrupt � 3KB internal receive and transmit buffers � Address Resolution Protocol (ARP) and flexible frame filtering � Programmable transmit threshold � Fast back-to-back transmission support with minimum interframe spacing Power-reduction Features � Advanced Configuration and Power Interface (ACPI) Specifications compliant � Reduced D3 power consumption � Deep Power Down � Efficient dynamic standby mode Compatibility Features ® � Footprint-compatible with the Intel 82540 Gigabit Ethernet controller � Pin-compatible and driver-compatible with 82559ER ® � Intel-supported 82551IT drivers also run on Intel 82551QM Physical Features � Thin BGA 15x15mm package Characteristics Electrical � Power Supply � Power Dissipation Environmental � Operating temperature � Storage temperature Physical � Package Order Code � 82551IT Benefits � Speeds data transfers � Enables packet prioritization for faster delivery of business-critical data � Provides low-cost network connectivity for LOM or PCI adapters interface with glueless 32-bit PCI bus master interface � Reduces board space requirements and external support circuitry � Enhances performance � Processes receive data concurrently � Prevents data overruns or underruns � Allows virtually connected IPv6, IPv4, Windows NT,* or next-generation systems � Utilizes bus more efficiently � Maximizes system throughput � Provides various power-down states and the ability to “wake-up” on a unique packet addressed to the system � Read the full Intel in Communications.

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