Head Office:

PMC-Sierra, Inc.

#105 - 8555 Baxter Place

Burnaby, B.C. V5A 4V7

Canada

Tel: 604.415.6000

Fax: 604.415.6200

PM7350 S/UNI-DUPLEX

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-990147 (P2)

© 1999 PMC-Sierra, Inc.

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC. AND FOR ITS CUSTOMERS’ INTERNAL USE

Dual Serial Link, PHY Multiplexer

Dual Serial Link, PHY Multiplexer

• 6 bit port ID prepended to each cell for

use by ATM layer to identify cell source

(1 of 32 PHYs or processor).

• Back-pressure provided by far end

(active link only) to prevent overflow of

far end receiver.

LVDS RECEIVE DIRECTION

• The LVDS link marked as "spare" is

monitored for errors, PHY cells are

discarded, microprocessor port cells

are accepted.

• Individual PHY and microprocessor

FIFO back-pressure indications are

sent to the far end to prevent FIFO

overflows. Per stream backpressure

prevents head-of-line blocking.

• Cells received from the active LVDS

link are forwarded to the appropriate

PHY, bit serial interface, or the

microprocessor port as specified by a

6 bit port ID added to each cell at the

far end device.

APPLICATIONS

•Single shelf or multi-shelf Digital

Subscriber Loop Access Multiplexer

(DSLAM).

• ATM/frame/IP switch or multiservice

access multiplexer.

• UMTS wireless base station and base

station controller.

modem #1

modem #2

modem #N

UTOPIA

Bus Master

PM7350

S/UNI-DUPLEX

Bus Slave or

Bus Master

PM7350

S/UNI-DUPLEX

4 Wire

LVDS

TYPICAL APPLICATIONS

INTER-SHELF UTOPIA BUS EXTENSION

MULTI-SHELF 1024 LINE ATM DSLAM

Common Card,

working

S/UNI-VORTEX

S/UNI-VORTEX

S/UNI-ATLAS

S/UNI-PLUS

processor

RAM

RAM

Common Card,

spare

UTOPIA Line Cards

xDSL PHY

xDSL PHY

S/UNI-DUPLEX

processor

Clock/Data Line Cards

modem

modem

S/UNI-DUPLEX

processor

S/UNI-VORTEX

S/UNI-VORTEX

S/UNI-APEX

S/UNI-ATLAS

S/UNI-PLUS

processor

RAM

RAM

S/UNI-APEX

1

32

1

16

8 Links per S/UNI-VORTEX