Reconfigurable computing is a potential paradigm which has been effectively performing mostly in the developments of devices likely Field Programmable Gate Arrays (FPGAs). This paper illustrates the reconfigurable architecture of FPGA and its types. Most widely used highspeed computation fabrics utilized in reconfigurable computing are FPGAs. This paper demonstrates the architectures used in reconfigurable computing and shows the various advantages of using reconfigurable computing design over conventional Application-Specific Integrated Circuits for achieving high level of performance for a desired application. The survey deals with the architecture of FPGAs and their types in detail. This paper also explains the highlights and challenges of fine-grained and coarsegrained architectures. FPGAs have supported partial reconfiguration over the few years. This survey also includes the partial reconfiguration techniques and the various applications of reconfigurability.

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