Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller
Datasheet
Chapter 1 General Description
The LAN9115 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 LAN9115 has been architected to provide the best price-performance ratio for any 16-bit
application with medium performance requirements. The LAN9115 is fully IEEE 802.3 10BASE-T and
802.3u 100BASE-TX compliant.
The LAN9115 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 exposing a 16-
bit external bus. The LAN9115 includes large transmit and receive data FIFOs to accommodate high
latency applications. In addition, the LAN9115 memory buffer architecture allows the most efficient use
of memory resources by optimizing packet granularity.
Applications
The LAN9115 is well suited for many medium-performance embedded applications, including:
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Printers, kiosks, POS terminals and security systems
Audio distribution systems
General embedded systems
Basic cable, satellite and IP set-top boxes
Vioce-over-IP solutions
The LAN9115 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 LAN9115 can
automatically generate flow control packets to the remote node, or assert back-pressure on the remote
node by generating network collisions.
The LAN9115 supports numerous power management and wakeup features. The LAN9115 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.
SMSC LAN9115
DATASHEET
9
Revision 1.1 (05-17-05)
SMSC [ SMSC CORPORATION ]
