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LAN9220

16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support

SMSC -> Microchip 

16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support

Datasheet

1.1

Block Diagram

System Memory

System

Peripherals

Microprocessor/

Microcontroller

System Bus

LAN9220

Magnetics

LEDS/

GPIO

Ethernet

25MHz

XTAL

EEPROM

(Optional)

Figure 1.1 System Block Diagram

The SMSC LAN9220 integrated 10/100 MAC/PHY controller is a peripheral chip that performs the

function of translating parallel data from a host controller into Ethernet packets. The LAN9220 Ethernet

MAC/PHY controller is designed and optimized to function in an embedded environment. All

communication is performed with programmed I/O transactions using the simple SRAM-like host

interface bus.

The diagram shown above, describes a typical system configuration of the LAN9220 in a typical

embedded environment.

The LAN9220 is a general purpose, platform independent, Ethernet controller. The LAN9220 consists

of four major functional blocks. The four blocks are:

„ 10/100 Ethernet PHY

„ 10/100 Ethernet MAC

„ RX/TX FIFOs

„ Host Bus Interface (HBI)

SMSC LAN9220

11

DATASHEET

Revision 2.7 (03-15-10)

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