LAN9252/PT

General Description

The LAN9220 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 LAN9220 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 LAN9220 accommodate lower voltage I/O signalling without the need for voltage level shifters.

PRODUCT FEATURES

Highlights
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 signalling 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
Video-over IP solutions, IP PBX & video phones
Wireless routers & access points
Audio distribution systems
Printers, kiosks, security systems
General embedded applications
Key Benefits
Non-PCI Ethernet controller for standard performance applications
— 16-bit interface
— 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 lead-free 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
0°C to +70°C Commercial Temperature Support

Applications

The LAN9220 is well suited for many embedded applications, including:
Printers, kiosks, POS terminals and security systems
Audio distribution systems
General embedded systems
Basic cable, satellite and IP set-top boxes
Voice-over-IP solutions