High-Performance Single-Chip 10/100 Non-PCI Ethernet Controller

SMSC LAN9118

3

Revision 0.5 (09-09-04)

PRODUCT PREVIEW

General Description

The LAN9118 is a full-featured, single-chip 10/100 Ethernet controller designed for embedded

applications where performance, flexibility, ease of integration and low cost are required. The LAN9118

has been specifically architected to provide the highest performance possible for any given

architecture. The LAN9118 is fully IEEE 802.3 10BASE-T and 802.3u 100BASE-TX compliant.

The LAN9118 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 and 32-bit microprocessors and microcontrollers. LAN9118 includes large transmit and

receive data FIFO’s with a high-speed host bus interface to accommodate high bandwidth, high latency

applications. In addition, the LAN9118 memory buffer architecture allows the most efficient use of

memory resources by optimizing packet granularity.

Applications

The LAN9118 is well suited for many high-performance embedded applications, including:

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Digital television

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Video record/playback systems

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Set-top boxes

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Printers and scanners

The LAN9118 supports numerous power management and wakeup features. The LAN9118 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.

The LAN9118 also supports features which reduce or eliminate packet loss. Its internal 16k SRAM can

hold over 200 received packets. If the receive FIFO gets too full, the LAN9118 can automatically

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

generating a network collision. The host controller can also.

The diagram shown in Figure 1, "System Block Diagram utilizing the SMSC LAN9118", describes a

typical system configuration of the LAN9118 in a typical embedded environment.

The LAN9118 is designed to be general purpose Ethernet controller that is platform independent. The

LAN9118 consists of four major functional blocks. The four blocks are:

1. 10/100 Ethernet PHY

2. 10/100 Ethernet MAC

3. RX/TX FIFO’s

4. Slave Interface Module