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TMC2072-MD Datasheet(PDF) 7 Page - SMSC Corporation |
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TMC2072-MD Datasheet(HTML) 7 Page - SMSC Corporation |
7 / 106 page Peripheral Mode CircLink™ Controller Datasheet SMSC TMC2072 Page 7 Revision 0.1 (01-30-06) DATASHEET 1.2 About the TMC2072 The TMC2072 network controller is CircLink technology’s flagship product. The TMC2072’s flexibility and rich feature set enable a high-reliability and high-performance, real-time and control-oriented network without the cumbersome middle layer protocol stacks and complex packet prioritization schemes typically required. TMC2072 operates at network data transfer rates up to 5 Mbps. Its embedded 1k Byte RAM can be configured into a maximum of 32 pages to implement a 31-node network where each node in the network has the same local memory. TMC2072 supports “Peripheral Mode” operation, which includes two selectable communication modes: “Free Format Mode” and “Remote Buffer Mode”. Free Format mode, retained from ARCNET, is “packet oriented” communication. Remote Buffer mode communication is a CircLink-specific feature, and is a token oriented communication, which includes automatic data transmission when the token arrives. The TMC2072 has a flexible 8-bit or 16-bit data bus to interface various CPU types including X86, 68XX, and SHx with multiplexed or non-multiplexed address/data. When operating in Peripheral mode, the TMC2072 has 8-bit programmable I/O available. When operating in Standalone mode, the TMC2072’s I/O configuration is16-bit. The TMC2072 also integrates a 3-port hub (two ports for external connection) to accommodate various network topologies (Bus, Star, etc.) and combinations. |
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