描述 Description

The LAN9221/LAN9221i is a full-featured, single-chip 10/100 Ethernet controller designed for embedded applications where performance, flexibility, ease of integration and system cost control are required. The LAN9221/LAN9221i has been specifically designed to provide high performance and throughput for 16-bit applications. The LAN9221/LAN9221i is fully IEEE 802.3 10BASE-T and 802.3u 100BASE-TX compliant, and supports HP Auto-MDIX. The variable voltage I/O signals of the LAN9221/LAN9221i accommodate lower voltage I/O signalling without the need for voltage level shifters.

The LAN9221/LAN9221i includes an integrated Ethernet MAC and PHY with a high-performance SRAM-like slave interface. The simple, yet highly functional host bus interface provides a glue-less connection to most common 16-bit microprocessors and microcontrollers as well as 32-bit microprocessors with a 16-bit external bus. The integrated checksum offload engines enable the automatic generation of the 16-bit checksum for received and transmitted Ethernet frames, offloading the task from the CPU. The LAN9221/LAN9221i also includes large transmit and receive data FIFOs to accommodate high latency applications. In addition, the LAN9221/LAN9221i memory buffer architecture allows highly efficient use of memory resources by optimizing packet granularity.



The?93AA46AE48 EEPROM device from Microchip comes with a factory programmed, globally unique EUI-48? MAC Address. This Ethernet controller will automatically detect and load the EUI-48? node address from the?93AA46AE48 EEPROM at start-up or reset.?



*The LANCheck online design review service is subject to?Microchip's Program Terms and Conditions and requires a myMicrochip?account.

特性 Features

Highlights
? Optimized for high performance applications
? Efficient architecture with low CPU overhead
? Easily interfaces to most 16-bit embedded CPU's
? 1.8V to 3.3V variable voltage I/O accommodates wide range of I/O signaling without voltage level shifters
? Integrated PHY with HP Auto-MDIX support
? Integrated checksum offload engine helps reduce CPU load
? Low pin count and small body size package for small form factor system designs
Target Applications
? Cable, satellite, and IP set-top boxes
? Digital video recorders and DVD recorder/players
? Digital TV
? Digital media clients/servers and home gateways
? Video-over IP solutions, IP PBX & video phones
? Wireless routers & access points
? High-end audio distribution systems
Key Benefits
? Non-PCI Ethernet controller for high performance applications
? 16-bit interface with fast bus cycle times
? Burst-mode read support
? Minimizes dropped packets
? Internal buffer memory can store over 200 packets
? Automatic PAUSE and back-pressure flow control
? Minimizes CPU overhead
? Supports Slave-DMA
? Interrupt Pin with Programmable Hold-off timer
? Reduces system cost and increases design flexibility
? SRAM-like interface easily interfaces to most Embedded CPU's or SoC's
? Reduced-Power Modes
? Numerous power management modes
? Wake on LAN
? Magic packet wakeup
? Wakeup indicator event signal
? Link Status Change
? Single chip Ethernet controller
? Fully compliant with IEEE 802.3/802.3u standards
? Integrated Ethernet MAC and PHY
? 10BASE-T and 100BASE-TX support
? Full- and Half-duplex support
? Full-duplex flow control
? Backpressure for half-duplex flow control
? Preamble generation and removal
? Automatic 32-bit CRC generation and checking
? Automatic payload padding and pad removal
? Loop-back modes
? Flexible address filtering modes
? One 48-bit perfect address
? 64 hash-filtered multicast addresses
? Pass all multicast
? Promiscuous mode
? Inverse filtering
? Pass all incoming with status report
? Disable reception of broadcast packets
? Integrated 10/100 Ethernet PHY
? Supports HP Auto-MDIX
? Auto-negotiation
? Supports energy-detect power down
? Host bus interface
? Simple, SRAM-like interface
? 16-bit data bus
? 16Kbyte FIFO with flexible TX/RX allocation
? One configurable host interrupt
? Miscellaneous features
? Small form factor, 56-pin QFN RoHS Compliant package
? Integrated 1.8V regulator
? Integrated checksum offload engine
? Mixed endian support
? General Purpose Timer
? Optional EEPROM interface
? Support for 3 status LEDs multiplexed with Programmable GPIO signals
? Single 3.3V Power Supply with Variable Voltage I/O
? Commercial and Industrial Temperature Support

應(yīng)用 Application

·Cable, satellite, and IP set-top boxes
·Digital video recorders and DVD recorder/players
·Digital TV
·Digital media clients/servers and home gateways
·Video-over IP solutions, IP PBX & video phones
·Wireless routers & access points
·High-end audio distribution systems

簡介

LAN9221屬于集成電路（IC）的控制器。由制造生產(chǎn)的LAN9221控制器該系列產(chǎn)品主要用于在采用不同通信協(xié)議和/或信令方法的端點之間提供信息連接。示例包括將 I2C 總線連接到 UART，將 USB 連接到 I2C、SPI、以太網(wǎng)或 UART、以太網(wǎng) MAC 和 PHY 等的器件。此外，還包括用于通過為點對點通信設(shè)計的接口建立多路連接的器件，例如 USB 集線器控制器。