LAN9221i SMSC [SMSC Corporation], LAN9221i Datasheet - Page 11
LAN9221i
Manufacturer Part Number
LAN9221i
Description
High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.LAN9221I.pdf
(151 pages)
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High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
Datasheet
SMSC LAN9221/LAN9221i
1.1
Microprocessor/
Microcontroller
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:
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
LAN9221/
LAN9221i
25MHz
XTAL
Peripherals
System
11
EEPROM
(Optional)
Magnetics
LEDS/
GPIO
Revision 2.6 (12-04-08)
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