SC220 PDF даташит
Спецификация SC220 изготовлена «Zarlink» и имеет функцию, называемую «XpressFlow 2020 Ethernet Routing Switch Chipset». |
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Детали детали
Номер произв | SC220 |
Описание | XpressFlow 2020 Ethernet Routing Switch Chipset |
Производители | Zarlink |
логотип |
30 Pages
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This information is available for your
convenience only.
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replacement product lists, please visit
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datasheet pdf - http://www.DataSheet4U.net/
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PRELIMINARY INFORMATION
Distinctive Characteristics
t Highly integrated central switch controller
t State of the art 0.35 micron 3.3 Volt CMOS
process
t 256-PIN PQFP package
t Operating frequency
◊ -40
◊ -50
40 MHz maximum
50 MHz maximum
◊ -66
66 MHz maximum
t 16-bit external CAM interface
◊ Supports ½k to 16k MAC addresses
t 32-bit Control Buffer Memory interface
◊ Supports 128k to 1M bytes
◊ Utilize high performance 32-bit Syn-
chronous Burst SRAM
t Hardware assisted Buffer and Queue Man-
agement to minimize CPU overhead
t 32-bit Management Bus I/O interface
◊ Allows host to access CAM and Control
Buffer Memory
◊ Supports Big and Little Endian CPUs
◊ Direct interface with various different
standard microprocessors including
386, 486 families and Motorola MPC se-
ries embedded processors
t 32-bit XpressFlow Bus Interface
◊ Switching bandwidth
−1.28 Gbps @ 40 MHz system clock
−1.60 Gbps @ 50 MHz system clock
−2.10 Gbps @ 66.67 MHz system clock
◊ Supports up to 8 Multi-port Network Ac-
cess Controllers
◊ XpressFlow Bus access arbitration
◊ XpressFlow Bus data transfer load
regulation
t Full IP Switching
◊ Addresses resolved by SC220
t MAC Address Mapping Table
◊ Supports either CAM based or SRAM
based Switching data base
SC220 – XpressFlow Engine
XpressFlow 2020 Ethernet Routing Switch Chipset
CAM
(Optional)
ADDRESS
MAPPING
TABLE
16
CONTROL
BUFFER
MEMORY
32
SC220
XpressFlow
ENGINE
http://www.DataSheet4U.net/
32
XpressFlow BUS
32
XpressFlow BUS
SC220 - XpressFlow Engine
General Description
The XpressFlow Engine contains the switching data base in-
terface and buffer management logic in order to do the switching
decision making for unicast, multicast, and broadcast frames.
Hardware assisted queue manager is incorporated to facilitate
buffer management. It also provides a generic Management Bus
interface to allow external processor to do initialization, learning,
VLAN, and RMON support, etc. In addition, a XpressFlow Bus
interface block is responsible for communicating with the Network
Access Controllers through the XpressFlow message passing
protocol.
Related Components:
t EA218E – 8-port 10Mbps Ethernet Access Controller
t EA218 – 6-port 10 + 2-port 10/100 Ethernet Access Controller
t EA234 – 4-port 10/100 Fast Ethernet
© 1998 Vertex Networks, Inc.
1999
1
Rev. 4.5 – February
datasheet pdf - http://www.DataSheet4U.net/
No Preview Available ! |
PRELIMINARY
XpressFlow-2020 Series –
Ethernet Switch Chipset
INFORMATION
SC220
XpressFlow Engine
Characteristics Continue
t Built-in address to port resolution
◊ Embedded 32-bit HISC™ (High density
Instruction Set Core) Processor
◊ Optimized architecture for switch appli-
cations
◊ Loadable firmware for easy upgrade
t Supports unicast, multicast, and broadcast
frames
t Address Filtering
◊ Destination & Source MAC address
matching & filtering
t VLAN classification & verification
◊ Up to 62 groups
◊ Level 1 and 2 mapping
◊ VLAN ID tagging & stripping
◊ Auto padding if necessary after stripping
t Supports Store-&-Forward Frame Forward-
ing Mode
t Collects statistics for RMON
SC220
XpressFlow
Engine
HISC Core
CAM
32
ADDRESS
MAPPING
TABLE
SRAM
CONTROL
BUFFER
MEMORY
CAM
Interface
16
16
HISC
I/O
Registers
Control
Buffer
32
Memory
32 Interface
32
32
16
32
32
XpressFlow Bus
Interafce
32
XpressFlow BUS
32
Mngmt
Bus
Interface
32
32
32
Automatic
Buffer
Manager
Block Diagram –
SC220 XpressFlow Engine
http://www.DataSheet4U.net/
Typical Application:
◊ A 16-port Ethernet Switch with 4-Fast Ethernet
© 1998 Vertex Networks, Inc.
1999
Address
Mapping
Table
Buffer
RAM
SC220
XpressFlow
Engine
Flash
ROM
RS232 Local
Control Console
Switch
Manager
CPU
DRAM
Management Bus
XpressFlow Bus
Buffer
RAM
EA208E
8-Port
Ethernet
Access
Controller
Buffer
RAM
EA208E
8-Port
Ethernet
Access
Controller
Buffer
RAM
EA234
4-Port
Ethernet
Access
Controller
8 Ethernet ports
8 Ethernet ports
Four 100M
Fast Ethernet ports
System Block Diagram --
16-Port Ethernet Switch with 4 Fast Ethernet Up-Links
2 Rev. 4.5 – February
datasheet pdf - http://www.DataSheet4U.net/
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