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RT54SX32-1CG256B Datasheet(PDF) 10 Page - Actel Corporation |
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RT54SX32-1CG256B Datasheet(HTML) 10 Page - Actel Corporation |
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10 / 46 page  SX Family FPGAs RadTolerant and HiRel 1- 6 v2.1 Routing Resources Clusters and SuperClusters can be connected through the use of two innovative local routing resources called FastConnect and DirectConnect that enable extremely fast and predictable interconnections of modules within Clusters and SuperClusters (see Figure 1-6 and Figure 1-7 on page 1-7). This routing architecture also dramatically reduces the number of antifuses required to complete a circuit, ensuring the highest possible performance. DirectConnect is a horizontal routing resource that provides connections from a C-cell to its neighboring R-cell in a given SuperCluster. DirectConnect uses a hardwired signal path requiring no programmable interconnection to achieve its fast signal propagation time of less than 0.1 ns. FastConnect enables horizontal routing between any two logic modules within a given SuperCluster, and vertical routing to the SuperCluster immediately below it. Only one programmable connection is used in a FastConnect path, delivering a maximum pin-to-pin propagation of 0.4 ns. In addition to DirectConnect and FastConnect, the architecture makes use of two globally oriented routing resources known as segmented routing and high-drive routing. Actel’s segmented routing structure provides a variety of track lengths for extremely fast routing between SuperClusters. The exact combination of track lengths and antifuses within each path is chosen by the 100% automatic place-and-route software to minimize signal propagation delays. Figure 1-6 • DirectConnect and FastConnect for Type 1 SuperClusters Type 1 SuperClusters Routing Segments • Typically Two Antifuses • Max. Five Antifuses FastConnect • One Antifuse DirectConnect • No Antifuses |
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