Preliminary PM3351 ELAN 1x100
Single-Port 10/100 Mbit/s Ethernet Switch
TYPICAL APPLICATION
LOW-COST 10/100 Mbit/s ETHERNET SWITCH
The ELAN 1×100 chip is used to build low-cost 10/100 Mbit/s switches for server/backbone applications. A switch can be created
from the following:
• PM3351s (one for every 100 Mbit/s port required),
• one to seven PM3350s (one for every eight 10 Mbit/s ports required),
• a bank of memory per device (60 ns EDO DRAM for each PM3350,
• 15 ns SRAM for each PM3351) for holding frame buffers and switching tables,
• a single 256k × 8-bit EPROM or EEPROM (initialization, configuration, and SNMP support firmware),
• quad 10BaseT interface adapters (LXT944) for the PM3350s,
• one 100 Mbit/s PHY device per PM3351, and
• appropriate passive components.
A block diagram of a typical 32-port 10BaseT stackable switch with two 10/100 Mbit/s ports is shown. The PCI expansion bus is
used to seamlessly connect the ELAN 8×10s and ELAN 1×100s.
8×10BaseT
Quad Quad
PHY PHY
8×10BaseT
Quad Quad
PHY PHY
10/100BaseT
10/100 PHY
PM3350
@G6IÃ'
PM3350
@G6IÃ'
PM3351
[ @G6IÃ
PCI Backplane
PM3350
@G6IÃ'
PM3350
@G6IÃ'
PM3351
[ @G6IÃ
Quad Quad
PHY PHY
8×10BaseT
Quad Quad
PHY PHY
8×10BaseT
10/100 PHY
10/100BaseT
Head Office:
PMC-Sierra, Inc.
#105 - 8555 Baxter Place
Burnaby, B.C. V5A 4V7
Canada
Tel: 604.415.6000
Fax: 604.415.6200
To order documentation,
send email to:
document@pmc-sierra.com
or contact the head office,
Attn: Document Coordinator
All product documentation is available
on our web site at:
http://www.pmc-sierra.com
For corporate information,
send email to:
info@pmc-sierra.com
PMC-970278 (P4)
© 1998 PMC-Sierra, Inc.
October, 1998
SmartPath is a trademark
of PMC-Sierra, Inc.