MEA-224 Zarlink Semiconductor, Inc., MEA-224 Datasheet - Page 2

• Manufacturer Part Number: MEA-224
• Description: 4-Port, Layer 2 Fast Ethernet Access Controller
• Manufacturer: Zarlink Semiconductor, Inc.

XpressFlow-2001 Series –
Ethernet Switch Chip-set
2. GENERAL DESCRIPTION:
The
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
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:
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2.2 Typical Application:
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©
1997
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
A 16-port Ethernet Switch with
4 Fast Ethernet Up-Links
EA-224
memory
(57(; (7:25.6
provides
interface
P R E L I M I N A R Y
four
and
Mapping
4-Port 10/100M Ethernet Access Controller
Address
16-Port Ethernet Switch with 4 Fast Ethernet Up-Links
Buffer
Buffer
Table
RAM
RAM
Memory
Buffer
Local
8 Ethernet ports
EA-224 4-Port Ethernet Access Controller
Page: 2
Controller
32
XpressFlow
Ethernet
EA208E
Access
8-Port
SC201
Engine
EA-224
D A T A
Interface
Memory
Buffer
Local
System Block Diagram --
Port 0
Port 0
Block Diagram –
Buffer
RAM
XpressFlow Bus
Management Bus
Switch Bus
Flash
ROM
Interafce
4-Port 100Base-Tx PHY
MAC Port #0 to #3
8 Ethernet ports
Management BUS
Controller
32
1
1
Ethernet
EA208E
Access
SWITCH BUS
S H E E T
MAC Interface
8-Port
Control Console
RS232 Local
Manager
32
Switch
32
CPU
Bus Interafce
Managem
2
2
Rev. 4.0 –December, 1997
Buffer
RAM
16
Fast Ethernet ports
3
3
Four 100M
Automatic
Manager
DRAM
Controller
Ethernet
Buffer
Access
EA224
4-Port
EA-224