VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
VSC870
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
High Performance Serial
Backplane Transceiver
• 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
RFM
RTM/TCLK REN
WSIN
WSOUT
OOS
RESYNEN
RESET
Retiming
Register
TXIN[31:0]
TXTYP[1:0]
TXEN
RTR
ABORT
BYPASS
WCLK
TXOK
RXOK
SCRAM
Transmit
Control
SCRAM
Parallel
to
Serial
TXCLK
Generator
TXSA+/TXSA-
TXSB+/TXSB-
FACLPBK
Alignment
Word Gen
Word/Cell
Aligner
CMU
REFCLK
DLYEN/CCKIN
MODE[1]
MODE[0]
LOOPBACK
RXSA+/RXSA-
RXSB+/RXSB-
RXSEL
TESTEN
VSCTE
RXCLK
Generator
Register
Receive
Control
Retiming
RXWA
RXTYP[1:0]
RXOUT[31:0]
ACK/RCLK
Serial
to
Parallel
CRU
DeSCRAM
RXEN
Signal Detect
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
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