PM5350

PMC-Sierra,Inc.

155 Mb/s SATURN User Network Interface

S/UNI-155-ULTRA

PMC-960709 (R4)

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

 1998 PMC-Sierra, Inc.

FEATURES

SONET/SDH ATM User Network

Interface (UNI) for category-5 (UTP-5),

Shielded Twisted Pair (STP) and

optical applications.

• Implements the ATM Transmission

Convergence (TC) sublayer according

to ATM Forum specifications using the

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

STM-1 and 51.84 Mb/s STS-1 formats.

• Provides on-chip UTP/STP drivers,

receivers, and line equalizers to allow

direct connection to 155 Mb/s UTP-5

or STP twisted pair wiring facilities

using line coupling transformers.

• Provides a selectable UTP/STP or

Pseudo-ECL (PECL) interface to allow

direct connection to Optical Data Links

(ODLs).

• Includes clock recovery and clock

synthesis with on-chip loop filters.

• Operates in timing master or timing

slave (loop timed) modes.

• Frames to SONET/SDH framing bytes

(A1, A2), processes the section and

line Bit Interleaved Parity (B1, 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 GFC and

XOFF flow control.

• Provides a synchronous 8-bit plus

parity SATURN-Compliant Interface for

PHYsical layer devices (SCI-PHY™)

bus operating at 50 MHz.

• Compatible with ATM Forum UTOPIA

interface format.

• 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 or 51.84 Mb/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

BLOCK DIAGRAM

Analog Edge

Microprocessor

Interface

RXD+

RXD-

TXD+

TXD-

TCA

TWRENB

TFCLK

RRDENB

RFCLK

RDAT[7:0]

RCA

RSOC

RXPRTY

TSEN

TXPRTY

TDAT[7:0]

TSOC

Transmit

ATM

4-Cell FIFO

LED

Control

Serial

to

Parallel

Receive

ATM Cell

Processor

Twisted

Pair Rx

Clock/Data

Recovery

Clock

Generator

Twisted

Pair Tx

SD

Receive

ATM

4-Cell FIFO

Receive

Framer and

Overhead

Processor

Parallel

to

Serial

Transmit

Framer and

Overhead

Processor

Transmit

ATM Cell

Processor