In addition, IOBs are responsible for controlling external connectivity and SMs provide configurable internal connectivity between the CLBs and IOBs within the FPGA. Each CLB is decomposed into several SLICEs, each of which contains look-up-tables (LUTs), flip-flops (FFs), and multiplexes (MUXs). ![]() CLB is a primary resource to realize target logic function. A typical FPGA conceptually consists of a tile of three major blocks, configurable logic blocks (CLBs), input/output blocks (IOBs), and switch matrices (SMs), as shown in Figure 1. Field programmable gate arrays (FPGAs) are a type of semiconductor device that can be reconfigured by register transfer level (RTL) designers to realize target functionality.
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