LAN9211 datasheet(9/147 Pages) SMSC

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High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support

Datasheet

SMSC LAN9211

Revision 2.9 (03-01-12)

DATASHEET

Chapter 1 General Description

The LAN9211 is a full-featured, single-chip 10/100 Ethernet controller designed for embedded

applications where performance, flexibility, ease of integration and system cost control are required.

The LAN9211 has been specifically designed to provide high performance and throughput for 16-bit

applications. The LAN9211 is fully IEEE 802.3 10BASE-T and 802.3u 100BASE-TX compliant, and

supports HP Auto-MDIX.

The LAN9211 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, offloading the task from the CPU. The

LAN9211 also includes large transmit and receive data FIFOs to accommodate high latency

applications. In addition, the LAN9211 memory buffer architecture allows highly efficient use of memory

resources by optimizing packet granularity.

Applications

The LAN9211 is well suited for many medium-high-performance embedded applications, including:

Medium-range cable, satellite and IP set-top boxes

High-end audio distribution systems

Digital video recorders

DVD Recorders/Players

Digital TV

Digital media clients/servers

Home gateways

The LAN9211 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 LAN9211 can

automatically generate flow control packets to the remote node, or assert back-pressure on the remote

node by generating network collisions.

The LAN9211 supports numerous power management and wakeup features. The LAN9211 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.

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