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RTAX250-SB624B Datasheet(PDF) 70 Page - Actel Corporation |
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RTAX250-SB624B Datasheet(HTML) 70 Page - Actel Corporation |
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70 / 170 page  RTAX-S/SL RadTolerant FPGAs 2- 52 v5.3 Routing Specifications Routing Resources The routing structure found in RTAX-S/SL devices enables any logic module to be connected to any other logic module while retaining high performance. There are multiple paths and routing resources that can be used to route one logic module to another, both within a SuperCluster and elsewhere on the chip. There are four primary types of routing within the RTAX-S/ SL architecture: DirectConnect, CarryConnect, FastConnect and Vertical and Horizontal Routing. DirectConnect DirectConnects provide a high-speed connection between an R-cell and its adjacent C-cell (Figure 2-39). This connection can be made from DCOUT of the C-cell to DCIN of the R-cell by configuring of the S1 line of the R-cell. This provides a connection that does not require an antifuse and has a delay of less than 0.1 ns. CarryConnect CarryConnects are used to build carry chains for arithmetic functions (Figure 2-39). The FCO output of the right C-cell of a two-C-cell Cluster drives the FCI input of the left C-cell in the two-C-cell Cluster immediately below it. This pattern continues down both sides of each SuperCluster column. Similar to the DirectConnects, CarryConnects can be built without an antifuse connection. This connection has a delay of less than 0.1 ns from the FCO of one two-C-cell Cluster to the FCI of the two-C-cell Cluster immediately below it (see the "Carry-Chain Logic" on page 2-46 for more information). FastConnect For high-speed routing of logic signals, FastConnects can be used to build a short distance connection using a single antifuse (Figure 2-40 on page 2-53). FastConnects provide a maximum delay of 0.4 ns. The outputs of each logic module connect directly to the Output Tracks within a SuperCluster. Signals on the Output Tracks can then be routed through a single antifuse connection to drive the inputs of logic modules either within one SuperCluster or in the SuperCluster immediately below it. Vertical and Horizontal Routing Vertical and Horizontal Tracks provide both local and long distance routing (Figure 2-41 on page 2-53). These tracks are composed of both short-distance, segmented routing and across-chip routing tracks (segmented at core tile boundaries). The short-distance, segmented routing resources can be concatenated through antifuse connections to build longer routing tracks. These short-distance routing tracks can be used within and between SuperClusters or between modules of non- adjacent SuperClusters. They can be connected to the Output Tracks and to any logic module input (R-cell, C-cell, Buffer, and TX module). Figure 2-39 • DirectConnect and CarryConnect |
Similar Part No. - RTAX250-SB624B |
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Similar Description - RTAX250-SB624B |
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