EA218E Datasheet, PDF (2/28 Pages) Zarlink Semiconductor Inc – EA218E 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset

PRELIMINARY INFORMATION
Distinctive Characteristics
8 10Mbps Ethernet Access Ports
9 Direct interface with 10BaseT
transceiver
0.5 micron 3.3 Volt CMOS process
352-BGA package
Operating frequency
9 -33
33 MHz maximum
9 -40
40 MHz maximum
9 -50
50 MHz maximum
9 -66
mum
66.66 MHz maxi-
32-bit Local Buffer Memory Interface
9 Supports 128k to 1M bytes
9 Utilize high performance 32-bit
Synchronous Burst SRAM
Hardware assisted Buffer and Queue
Management
16-bit Management Bus I/O Interface
9 Allows host to access Control
Registers & Local Buffer Memory
9 Big and Little Endian CPUs
9 Direct interface to standard micro-
processors, including 386, 486
families and Motorola MPC series
embedded processors
32-bit XpressFlow Bus Interface
9 Uses Granule for frame transfer-
ring between Access Controllers
Unicast, multicast, and broadcast
frames
9 Also detects IEEE 802.3X MAC
Control frames
Works together with SC-220 Xpress-
Flow Engine
9 Forwards frames at full line-rate
9 Distributed Flow Caching™ to re-
duce frame forwarding latency
Half and Full Duplex operation
Programmable Flow Control
9 Jam Collision for Half Duplex
Mode
9 Transmit Flow Control Frame for
IEEE 802.3x Full Duplex Mode
Supports Store-&-Forward frame forward-
© 1998 Zarlink Semiconductor, Inc.
EA218E – 8-Port Ethernet Access Controller
XpressFlow 2020 Ethernet Routing Switch Chipset
LOCAL
BUFFER
MEMORY
XPRESSFLOW BUS
MANAGEMENT BUS
16
32
EA-218E
8-Port Ethernet
Access Controller
Port Port Port Port Port Port Port Port
01234567
10BaseT
Phyiscal Layer
Transceiver
8 10BaseT Ports
Block Diagram-
EA218E 8-Port Ethernet Access Controller
General Description
The EA-218E provides eight 10Mbps Ethernet network access interface ports.
The EA-218E provides the Ethernet MAC protocols, handles the local buffer memory
interface and management, arbitrates among multiple priority queues, and interfaces
with the XpressFlow Engine and other Access Controllers through the XpressFlow
message passing protocol.
Related Components:
SC220 – XpressFlow Engine
EA218 – 6-port 10 + 2-port 10/100 Ethernet Access Controller
EA234 – 4-port 10/100Mbps Ethernet Access Controller
1
Rev.2.1 – February, 1999