LAN9220 datasheet(4/142 Pages) MICROCHIP

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LAN9220

DS00002417A-page 4

 2006-2017 Microchip Technology Inc.

1.0

GENERAL DESCRIPTION

The LAN9220 is a full-featured, single-chip 10/100 Ethernet controller designed for embedded applications where per-

formance, flexibility, ease of integration and system cost control are required. The LAN9220 is fully IEEE 802.3

10BASE-T and 802.3u 100BASE-TX compliant, and supports HP Auto-MDIX. The variable voltage I/O signals of the

LAN9220 accommodate lower voltage I/O signalling without the need for voltage level shifters.

The LAN9220 includes an integrated Ethernet MAC and PHY with a high-performance SRAM-like slave interface. The

simple, yet highly functional host bus interface provides a glue-less connection to most common 16-bit microprocessors

and microcontrollers as well as 32-bit microprocessors with a 16-bit external bus. The integrated checksum offload

engines enable the automatic generation of the 16-bit checksum for received and transmitted Ethernet frames, offload-

ing the task from the CPU. The LAN9220 also includes large transmit and receive data FIFOs to accommodate high

latency applications. In addition, the LAN9220 memory buffer architecture allows highly efficient use of memory

resources by optimizing packet granularity.

Applications

The LAN9220 is well suited for many embedded applications, including:

• Printers, kiosks, POS terminals and security systems

• Audio distribution systems

• General embedded systems

• Basic cable, satellite and IP set-top boxes

• Voice-over-IP solutions

The LAN9220 also supports features which reduce or eliminate packet loss. Its internal 16-KByte SRAM can hold over

200 received packets. If the receive FIFO gets too full, the LAN9220 can automatically generate flow control packets to

the remote node, or assert back-pressure on the remote node by generating network collisions.

The LAN9220 supports numerous power management and wakeup features. The LAN9220 can be placed in a reduced

power mode and can be programmed to issue an external wake signal via several methods, including “Magic Packet”,

“Wake on LAN” and “Link Status Change”. This signal is ideal for triggering system power-up using remote Ethernet

wakeup events. The device can be removed from the low power state via a host processor command.

LAN9220 Datasheet(PDF) 4 Page - Microchip Technology