Microchip Technology, Inc. 10/100 Base-T/TX Ethernet Controller with PCI Interface LAN9420

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. *The LANCheck online design review service is subject to Microchip's Program Terms and Conditions and requires a myMicrochip account. Additional Features 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 RoHS Compliant package Environmental Available in commercial & industrial temperature ranges