LAN9420/LAN9420i
Single-Chip Ethernet Controller with HP
Auto-MDIX Support and PCI Interface

	LAN9420/LAN9420i General Description
	Data Sheet, Application Notes, Drivers and Design Tools
	LANCheck™ Online Review

Highlights

	Optimized for embedded applications with 32-bit RISC CPUs
	Integrated descriptor based scatter-gather DMA and IRQ deassertion timer effectively increase network throughput and reduce CPU loading
	Integrated Ethernet MAC with full-duplex support
	Integrated 10/100 Ethernet PHY with HP Auto-MDIX Support
	32-bit, 33MHz, PCI 3.0 compliant interface
	Reduced power operating modes with PCI Power Management Specification 1.1 compliance
	Supports multiple audio & video streams over Ethernet

Target Applications

	Cable, satellite, and IP set-top boxes
	Digital televisions
	Digital video recorders
	Home gateways
	Digital media clients/servers
	Industrial automation systems
	Industrial/single board PC
	Kiosk/POS enterprise equipment

Key Benefits

	Integrated High-Performance 10/100 Ethernet Controller Fully compliant with IEEE 802.3/802.3u Integrated Ethernet MAC and PHY 10BASE-T and 100BASE-TX support Full- and Half-duplex support Full-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 Wakeup packet support Integrated 10/100 Ethernet PHY Auto-negotiation Automatic polarity detection and correction Supports HP Auto-MDIX Supports energy-detect power down Support for 3 status LEDs Receive and transmit TCP checksum offload
	PCI Interface PCI Local Bus Specification Revision 3.0 compliant 32-bit/33-MHz PCI bus Descriptor based scatter-gather DMA enables zero-copy drivers
	Comprehensive Power Management Features Supports PCI Bus Power Management Interface Specification, Revision 1.1 Supports optional wake from D3cold (via configuration strap option when Vaux is available) Wake on LAN Wake on link status change (energy detect) Magic packet wakeup
	General Purpose I/O 3 programmable GPIO pins 2 GPO pins
	Support for Optional EEPROM Serial interface provided for EEPROM Used to store PCI and MAC address configuration values
	Miscellaneous features Big/Little/Mixed endian support for registers, descriptors, and buffers IRQ deassertion timer General purpose timer
	Single 3.3V Power Supply Integrated 1.8V regulator
	Packaging Available in 128-pin VTQFP Lead-free RoHS Compliant package
	Environmental Available in commercial & industrial temperature ranges

General Description

LAN9420/LAN9420i is a full-featured, Fast Ethernet controller which allows for the easy and cost-effective integration of Fast Ethernet into a PCI-based system. LAN9420/LAN9420i consists of a PCI Local Bus Specification Revision 3.0 compliant interface, DMA Controller, Ethernet MAC, and 10/100 Ethernet PHY.

LAN9420/LAN9420i provides full IEEE 802.3 compliance and all internal components support full/half-duplex 10BASE-T, 100BASE-TX, and manual full-duplex flow control. The descriptor based scatter-gather DMA supports usage of zero-copy drivers, effectively increasing throughput while decreasing Host load. The integrated IRQ deassertion timer allows a minimum IRQ deassertion time to be set, providing reduced Host load and greater control over service routines. Automatic 32-bit CRC generation/checking, automatic payload padding, and 2K jumbo packets (2048 byte) are supported.

LAN9420/LAN9420i Data Sheet, Application Notes,
Drivers and Design Tools

Description	File Name	File Size	Date
LAN9420/LAN9420i Data Brief	9420db.pdf	273K	3/31/08
LAN9420/LAN9420i Data Sheet	9420.pdf	1673K	3/31/08
Reference Design Files
LAN9420/LAN9420i Reference Design Schematic	9420sch.pdf	49K	4/2/08
LAN9420/LAN9420i Reference Design Bill of Materials	9420bom.pdf	19K	4/8/08
LANCheck™ Online Review
The LAN9420 is supported by SMSC's LANCheck Online Review, a personalized, value-added service exclusive to SMSC and available at no charge to customers who have selected our Ethernet offerings for their application design-in. LANCheck will support your design process by providing guidance through the complete design cycle – from initial schematic design to PCB design. The following documents are available to assist you with your design:
LAN9420
LAN9420 Schematic Checklist
LAN9420i
LAN9420i Schematic Checklist
Application Notes
Application Note 8-13: Suggested Magnetics	an813.pdf	253K	2/6/08
Source Code
SRC-9420-LINUX LAN9420/LAN9420i Linux 2.4 and 2.6 driver source code	Download	E-Services Account Required

Contact your SMSC Sales Representative for more information on the LAN9420/LAN9420i.

All claims made herein speak as of the date of this material. The company does not undertake to update such statements. (4/08)