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SC220C0PTAV Datasheet(PDF) 2 Page - Zarlink Semiconductor Inc |
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SC220C0PTAV Datasheet(HTML) 2 Page - Zarlink Semiconductor Inc |
2 / 34 page PRELIMINARY INFORMATION © 1998 Vertex Networks, Inc. 1 Rev. 4.5 – February 1999 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 40 MHz maximum ◊ -50 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 CONTROL BUFFER MEMORY XpressFlow BUS XpressFlow BUS 32 32 32 SC220 XpressFlow ENGINE ADDRESS MAPPING TABLE 16 CAM (Optional) 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 |
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