ACTEL.pdf - Types of FPLDs(Review Actel ACT Routing...

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1 Spring 2006, Lecture 22 Types of FPLDs (Review) ! Layout / routing ! Row-based: Actel ! Matrix-based: Altera, Quicklogic, Xilinx Actel ACT 1, ACT 2, ACT 3 Quicklogic Crosspoint Altera MAX 5000, 7000 (Salcic 2.1) Xilinx EPLD Plessy Antifuse EPROM SRAM P r o g r a m m i n g M e t h o d Multiplexor Look-Up Table (LUT) AND-OR Type of Base Cell FPGAs CPLDs Altera Flex 8000, Flex 10K (Salcic 2.2) Xilinx LCA 2000, 3000, 4000 (Salcic 2.3) 2 Spring 2006, Lecture 22 Actel ACT Routing Architecture Figures from Field-Programmable Gate Array Technology , Trimberger, Kluwer, 1994 3 Spring 2006, Lecture 22 Actel ACT Routing Architecture (cont.) ! An Actel FPGA has rows of cells, with horizontal channels between them, and vertical “channels” called columns ! Cell inputs must come from one of the 2 adjacent horizontal tracks (either figure) ! Cell outputs can attach to: ! A dedicated short vertical track called the “output segment” (see bottom figure) ! Output segment spans only two channels above and below the cell ! Long vertical tracks— see top figure, where output goes to LVT instead of its dedicated output segment ! These are vertical segments of varying lengths that can be joined together to form vertical segmented tracks 7 Spring 2006, Lecture 22 Actel ACT Routing Architecture (cont.) Figure from Field-Programmable Gate Array Technology , Trimberger, Kluwer, 1994 ! Input segments connect to uncommitted horizontal segment by antifuses ! Horizontal segments connect by antifuses !
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  • Winter '16
  • tulasi kumar
  • Logic gate, Field-programmable gate array, Altera

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