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SMSC LAN9420/LAN9420i DATASHEET Revision 1.22 (09-25-08)
Datasheet
PRODUCT FEATURES
LAN9420/LAN9420i
Single-Chip Ethernet Controller
with HP Auto-MDIX Support
and PCI Interface
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 IEEE802.3/802.3u
— 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