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A54SX72A-FGG208A Datasheet(PDF) 7 Page - Actel Corporation |
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A54SX72A-FGG208A Datasheet(HTML) 7 Page - Actel Corporation |
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7 / 68 page  v2.2 1-3 Routing Resources Clusters and SuperClusters can be connected through the use of two innovative local routing resources called FastConnect and DirectConnect, which enable extremely fast and predictable interconnection of modules within Clusters and SuperClusters (Figure 1-5 on page 1-4 and Figure 1-6 on page 1-5). 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 with the SuperCluster immediately below it. Only one programmable connection is used in a FastConnect path, delivering a maximum pin-to-pin propagation time of 0.5 ns. Figure 1-2 • R-Cell Figure 1-3 • C-Cell DQ DirectConnect Input CLKA, CLKB, Internal Logic HCLK CKS CKP CLR PRE Y Routed Data Input S0 S1 D0 D1 D2 D3 DB A0 B0 A1 B1 Sa Sb Y |
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