lan9220 Standard Microsystems Corp., lan9220 Datasheet - Page 11

• Manufacturer Part Number: lan9220
• Description: 16-bit Non-pci Small Form Factor 10/100 Ethernet Controller With Variable Voltage I/o & Hp Auto-mdix Support
• Manufacturer: Standard Microsystems Corp.

16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support
Datasheet
SMSC LAN9220
1.1
Microprocessor/
Microcontroller
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:
Block Diagram
10/100 Ethernet PHY
10/100 Ethernet MAC
RX/TX FIFOs
Host Bus Interface (HBI)
System Bus
Figure 1.1 System Block Diagram
DATASHEET
System Memory
LAN9220
25MHz
XTAL
Peripherals
System
11
EEPROM
(Optional)
Magnetics
LEDS/
GPIO
Revision 2.6 (12-04-08)
Ethernet