LAN9221 Datasheet, PDF (11/151 Pages) SMSC Corporation – High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O

High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
Datasheet
1.1
Block Diagram
System Memory
System
Peripherals
Microprocessor/
Microcontroller
System Bus
LAN9221/
LAN9221i
Magnetics
LEDS/
GPIO
Ethernet
25MHz
XTAL
EEPROM
(Optional)
Figure 1.1 System Block Diagram
The SMSC LAN9221/LAN9221i 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
LAN9221/LAN9221i 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 LAN9221/LAN9221i in a
typical embedded environment.
The LAN9221/LAN9221i is a general purpose, platform independent, Ethernet controller. The
LAN9221/LAN9221i 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 LAN9221/LAN9221i
11
DATASHEET
Revision 2.6 (12-04-08)