LAN9420I-NU

The 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. The LAN9420i consists of a PCI Local Bus Specification Revision 3.0 compliant interface, DMA Controller, Ethernet MAC, and 10/100 Ethernet PHY.

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.

Big, little, and mixed endian support provides independent control over register, descriptor, and buffer endianess. This feature enables easy integration into various ARM/MIPS/PowerPC designs.

LAN9420i supports the PCI Bus Power Management Interface Specification Revision 1.1 and provides the optional ability to generate wake events in the D3cold state when Vaux is available. Wake on LAN, wake on link status change (energy detect), and magic packet wakeup detection are also supported, allowing for a range of power management options.

LAN9420i contains an EEPROM controller for connection to an optional EEPROM. This allows for the automatic loading of static configuration data upon power-up or reset. When connected, the EEPROM can be configured to load a predetermined MAC address, the PCI SSID, and the PCI SSVID of LAN9420i.

• Optimized for embedded applications with 32-bit RISC CPUs
• Integrated descriptor based scatter-gather DMA and IRQ de-assertion 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