High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX
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 the highest performance possible for any 16-
bit application.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 the most 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
High-definition televisions
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.
Revision 1.93 (11-27-07)
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SMSC LAN9211
DATASHEET
SMSC [ SMSC CORPORATION ]
