PMC-930908 (R9)

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

 1998 PMC-Sierra, Inc. October,

PM5346

PMC-Sierra,Inc.

155 Mb/s SATURN User Network Interface for LANs

S/UNI-155-LITE

FEATURES

SONET/SDH ATM User Network

Interface (UNI).

• Implements the ATM transmission

convergence (TC) sublayer according

to ATM Forum specifications using the

SONET/SDH 155.52 Mbit/s STS- 3c/

STM-1, and 51.84 Mbit/s STS-1

formats.

• Supports ATM-Forum mid-range PHY

and PMC-Sierra UNI-PHY™ subrates

at 25.92 and 12.96 Mbit/s.

• Supports UTP-5 or STP twisted pair

wiring interface devices and optical

driver and receiver modules for fiber

optic cable interfaces.

• Includes on-chip, Bellcore-compliant

clock recovery and clock synthesis.

• Operates in timing master or timing

slave (loop timed) modes.

• Frames to SONET/SDH framing bytes

(A1 and A2), processes the section

and line Bit Interleaved Parity (B1 and

B2) and the Far-End Block Error (Z2)

bytes.

• Interprets the H1, H2, and H3 payload

pointer bytes.

• Processes the SONET path overhead

BIP-8 (B3), signal label (C2), and path

status (G1) bytes.

• Inserts and extracts ATM payloads

using ATM cell delineation.

• Provides on-chip FIFO buffers in both

transmit and receive paths.

• Provides on-chip support for Generic

Flow Control (GFC) and XOFF flow

control.

• Provides a synchronous, 8-bit, plus-

parity SATURN-Compliant Interface for

PHYsical layer devices (SCI-PHY™)

bus operating at 33 MHz.

• Compatible with ATM Forum UTOPIA

interface format, with support for multi-

PHY applications.

• Provides a generic 8-bit

microprocessor bus interface for

configuration, control, and monitoring.

• Provides TTL-compatible inputs and

outputs and differential PECL inputs.

• Low power, +5 V CMOS technology.

• Packaged in a 128-pin 14 mm by

20 mm Plastic Quad Flat Pack (PQFP)

with 0.5 mm lead pitch.

APPLICATIONS

• 155.52, 51.84, 25.92 and 12.96 Mbit/s

Twisted Pair or Optical ATM LANs

• Workstations and Personal Computer

NIC Cards

• Switches, Hubs, and Router Port

Cards

• SONET- or SDH-Compliant ATM UNIs

Clock

Generator

TRCLK+

TRCLK-

TXC+

TXC-

TXD+

TSOC

TXD-

RXDO+

ALOS+

ALOS-

Microprocessor

Interface

Driver

Parallel

to Serial

Serial to

Parallel

Data

Recovery

RXD+

RXD-

RXDO-

Clock

Recovery

RRCLK+

RRCLK-

Transmit

Framer and

Overhead

Processor

Receive

Framer and

Overhead

Processor

Transmit ATM

Cell

Processor

Receive ATM

Cell

Processor

Transmit ATM

Cell FIFO

Receive ATM

Cell FIFO

TXPRTY

TDAT[7:0]

TFCLK

TWRENB

TCA

RSOC

RXPRTY

RDAT[7:0]

TSEN

RFCLK

RRDENB

RCA

Line Side

System Side

BLOCK DIAGRAM