參數(shù)資料
型號: MEA224AG
廠商: CONEXANT SYSTEMS
元件分類: 微控制器/微處理器
英文描述: 4 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PBGA352
封裝: 35 X 35 MM, 2.33 MM HEIGHT, PLASTIC, MS-034, BGA-352
文件頁數(shù): 23/29頁
文件大?。?/td> 519K
代理商: MEA224AG
PRELI
MI
NARY
D
A
TA
S
H
EET
XpressFlow-2001 Series –
EA-224
Ethernet Switch Chip-set
4-Port 10/100M Ethernet Access Controller
1997 Zarlink Semiconductor Inc.
Page: 2
Rev. 4.0 –December, 1997
2. GENERAL DESCRIPTION:
The
EA-224
provides
four
10/100Mbps Ethernet network ac-
cess interface ports. MII interface
is used to connect external PHY
devices for 100 Mbps Ethernet.
They also can direct connect with
standard 10Mbps serial interface.
The EA-224 provides the Ethernet
MAC protocols, handles the local
buffer
memory
interface
and
management,
arbitrates
among
multiple priority queues, and in-
terfaces with the XpressFlow En-
gine and other Access Controllers
through the XpressFlow message
passing protocol.
2.1 Related Components:
SC-201 – XpressFlow Engine
EA-208E – 8-port 10Mbps
Ethernet Access Controller
EA-208 – 6-port 10 + 2-port
10/100 Ethernet Access Con-
troller
EA-222 – 2-port 10/100 Fast
Ethernet Access Controller
2.2 Typical Application:
A 16-port Ethernet Switch with
4 Fast Ethernet Up-Links
Local
Buffer
Memory
Management BUS
SWITCH BUS
Switch Bus
Interafce
MAC Port #0 to #3
Port 0
2
3
16
32
4-Port 100Base-Tx PHY
Managem
Bus Interafce
Local
Buffer
Memory
Interface
Automatic
Buffer
Manager
MAC Interface
1
Port 0
2
3
1
32
EA-224
Block Diagram –
EA-224 4-Port Ethernet Access Controller
Address
Mapping
Table
Flash
ROM
SC201
XpressFlow
Engine
EA208E
8-Port
Ethernet
Access
Controller
Management Bus
Buffer
RAM
Switch
Manager
CPU
DRAM
RS232 Local
Control Console
Buffer
RAM
8 Ethernet ports
Buffer
RAM
8 Ethernet ports
XpressFlow Bus
EA208E
8-Port
Ethernet
Access
Controller
Buffer
RAM
Four 100M
Fast Ethernet ports
EA224
4-Port
Ethernet
Access
Controller
System Block Diagram --
16-Port Ethernet Switch with 4 Fast Ethernet Up-Links
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