Backplane Transceiver. VSC870 Datasheet

VSC870 Transceiver. Datasheet pdf. Equivalent

Part VSC870
Description High Performance Serial Backplane Transceiver
Feature Data Sheet VSC870 VITESSE SEMICONDUCTOR CORPORATION High Performance Serial Backplane Transceiver .
Manufacture Vitesse Semiconductor
Datasheet
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Data Sheet VSC870 VITESSE SEMICONDUCTOR CORPORATION High P VSC870 Datasheet
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VSC870
Data Sheet
VSC870
VITESSE
SEMICONDUCTOR CORPORATION
High Performance Serial
Backplane Transceiver
Features
• Performs 32-Bit Parallel to Serial and Serial to
Parallel Functions
• Serial Data Rates are 2.0Gb/s
• Designed in Conjunction with the VSC880 Serial
Crosspoint Switch
• Performs Bit Alignment, Word Alignment and
Cell Alignment
• Three Modes of Operation:
Distributed Control Packet Mode, Central
Control Cell Mode and Direct Mode
• Support for Multicast and Multiple Input Queues
• Supports Priorities, Camp-on and
Retransmission Capability in Packet Mode
• Built-in Flow Control Channel in Packet Mode
• Supports Cell Synchronization in Cell Mode
• Interfaces Directly with Industry Standard
FIFOs
• Contains Redundant Serial I/Os and Internal
Loopback Mode
• 5V Tolerant TTL Inputs
• Single 3.3V Power Supply
• Available in 192 BGA Package
VSC870 Block Diagram
TXIN[31:0]
TXTYP[1:0]
TXEN
RTR
ABORT
BYPASS
WCLK
TXOK
RXOK
RXWA
RXTYP[1:0]
RXOUT[31:0]
ACK/RCLK
RXEN
RFM
RTM/TCLK REN
WSIN WSOUT OOS RESYNEN
Transmit
Control SCRAM
Parallel
to
Serial
Alignment
Word Gen
TXCLK
Generator
Word/Cell
Aligner
RXCLK
Generator
Receive
Control
DeSCRAM
Serial
to
Parallel
CRU
Signal Detect
RESET
SCRAM
TXSA+/TXSA-
CMU
TXSB+/TXSB-
FACLPBK
REFCLK
DLYEN/CCKIN
MODE[1]
MODE[0]
LOOPBACK
RXSA+/RXSA-
RXSB+/RXSB-
RXSEL
TESTEN
VSCTE
CELLSYN
ALIVE
LTIME
G52190-0, Rev 4.1
01/05/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Page 1



VSC870
VITESSE
SEMICONDUCTOR CORPORATION
High Performance Serial
Backplane Transceiver
Data Sheet
VSC870
General Description
The VSC870 serial backplane transceiver has been designed to operate with the VSC880 serial crosspoint switch
to establish a synchronous high performance switching system. The VSC870 can also connect directly to another
transceiver to act as a high bandwidth backplane interconnect link. The transmitter converts a 32-bit parallel interface
operating at 62.5Mb/s to a 34-bit serial data stream operating a 2.125Gb/s. The receiver converts a 34-bit serial
interface operating at 2.125Gb/s to a 32-bit parallel interface operating at 62.5Mb/s. The transceiver performs
automatic bit alignment, word alignment and cell alignment to a connected switch chip or another transceiver. The
parallel interface has been designed with industry-standard FIFOs in mind to provide such features as automatic
packet retransmission, multicast with retransmission, camp-on and support for virtual output queues. These features
can also be bypassed to give the user direct control of the serial data stream. In addition, the transceiver and switch
chip can operate in a early arbitration mode that greatly improves bandwidth utilization. The transceiver also contains
a built-in a flow control channel and redundant serial I/O buffers.
The transceiver and switch chip have been optimized to be used in both distributed-controlled packet-based
switching systems (Packet Mode), and centrally-controlled cell-based switching systems (Cell Mode). The
transceiver can also be directly connected to another transceiver (Direct Mode) for backplane interconnect
applications. The transceiver runs off a 3.3V power supply. The serial I/O buffers contain on-chip termination
resistors (See Figure 19).
Page 2
© VITESSE SEMICONDUCTOR CORPORATION 741 Calle Plano Camarillo, CA 93012
Tel: (800) VITESSE FAX: (805) 987-5896 Email: prodinfo@vitesse.com
Internet: www.vitesse.com
G52190-0, Rev 4.1
01/05/01





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