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RTSX32SU Datasheet(PDF) 9 Page - Actel Corporation |
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RTSX32SU Datasheet(HTML) 9 Page - Actel Corporation |
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9 / 83 page  RTSX-SU RadTolerant FPGAs (UMC) v2.2 1-3 Routing R-cells and C-cells within 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. This routing architecture also dramatically reduces the number of antifuses required to complete a circuit, ensuring the highest possible performance (Figure 1-3 and Figure 1-4 on page 1-4). 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 interconnect propagation delay 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-percent-automatic place-and-route software to minimize signal propagation delays. Figure 1-2 • R-Cell, C-Cell and Cluster Organization Type 1 SuperCluster Type 2 SuperCluster Cluster 1 Cluster 1 Cluster 2 Cluster 1 R-Cell C-Cell D0 D1 D2 D3 DB A0 B0 A1 B1 Sa Sb Y Direct Connect Input CLKA, CLKB, Internal Logic HCLK CKS CKP CLR PRE Y DQ Routed Data Input S0 S1 |
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