LAN9420 Series
10/100 Base-T/TX Ethernet Controller with PCI Interface
Manufacturer: Microchip Technology
Catalog
10/100 Base-T/TX Ethernet Controller with PCI Interface
Key Features
• **•**Optimized for embedded applications with 32-bit RISC CPUs
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• **•**Integrated descriptor based scatter-gather DMA and IRQ deassertion timer effectively increase network throughput and reduce CPU loading
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• **•**Integrated Ethernet MAC with full-duplex support
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• **•**Integrated 10/100 Ethernet PHY with HP Auto-MDIX Support
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• **•**32-bit, 33MHz, PCI 3.0 compliant interface
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• **•**Reduced power operating modes with PCI Power Management Specification 1.1 compliance
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• **•**Supports multiple audio & video streams over Ethernet
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• **•**Fully compliant with IEEE 802.3/802.3u
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• **•**Integrated Ethernet MAC and PHY
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• **•**10BASE-T and 100BASE-TX support
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• **•**Full- and Half-duplex support
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• **•**Full-duplex flow control
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• **•**Preamble generation and removal
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• **•**Automatic 32-bit CRC generation and checking
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• **•**Automatic payload padding and pad removal
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• **•**Loop-back modes
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• **•**One 48-bit perfect address
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• **•**64 hash-filtered multicast addresses
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• **•**Pass all multicast
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• **•**Promiscuous mode
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• **•**Inverse filtering
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• **•**Pass all incoming with status report
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• **•**Wakeup packet support
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• **•**Auto-negotiation
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• **•**Automatic polarity detection and correction
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• **•**Supports HP Auto-MDIX
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• **•**Supports energy-detect power down
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• **•**Support for 3 status LEDs
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• **•**Receive and transmit TCP checksum offload
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• **•**PCI Local Bus Specification Revision 3.0 compliant
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• **•**32-bit/33-MHz PCI bus
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• **•**Descriptor based scatter-gather DMA enables zero-copy drivers
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• **•**Supports PCI Bus Power Management Interface Specification, Revision 1.1
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• **•**Supports optional wake from D3cold (via configuration strap option when Vaux is available)
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• **•**Wake on LAN
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• **•**Wake on link status change (energy detect)
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• **•**Magic packet wakeup
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• **•**3 programmable GPIO pins
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• **•**2 GPO pins
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• **•**Serial interface provided for EEPROM
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• **•**Used to store PCI and MAC address configuration values
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• **•**Big/Little/Mixed endian support for registers, descriptors, and buffers
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• **•**IRQ deassertion timer
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• **•**General purpose timer
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• **•**Integrated 1.8V regulator
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• **•**Available in 128-pin VTQFP RoHS Compliant package
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• **•**Available in commercial & industrial temperature ranges
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• 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
Description
AI
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.
Microchip's complimentary and confidential [MicroCHECK](https://www.microchip.com/en-us/support/design-help/design-check-services) design review service, which offers insight from the initial concept to the final PCB layout, is available to customers who are using our products in their projects. You can confidently submit your design materials in a secure and private setting, and our expert engineers will provide individualized feedback to enhance your design. MicroCHECK design review service is subject to Microchip's [Program Terms and Conditions](https://www.microchip.com/en-us/support/design-help/design-check-services/design-check-services-program-terms-and-conditions) and requires a myMicrochip account.
