LAN9221
10Base-T/100Base-TX Ethernet Controller with 16 bit interface
制造商:
产品信息
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 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 EEPROM at start-up or reset.
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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