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Exploring FPGA Logic Block Architecture for Reduced Configuration MemoryHUSSAIN, F. , IQBAL, M. M. , PARVEZ, H. , RASHID, M.
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clustering algorithms, field programmable gate arrays, programmable logic arrays, reconfigurable architectures, reconfigurable logic
fpga(17), systems(12), logic(12), parvez(10), application(10), specific(8), reconfigurable(8), fpgas(8), computing(8), programmable(7)
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About this article
Date of Publication: 2022-08-31
Volume 22, Issue 3, Year 2022, On page(s): 15 - 24
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2022.03002
Web of Science Accession Number: 000861021000002
SCOPUS ID: 85137679653
The reduction of reconfiguration delay, during the partial dynamic reconfiguration of FPGAs, is important. In this context, the bitstream compression technique is one of the widely used techniques. These compression techniques only minimize the size of the bitstream whereas the actual configuration memory size on FPGA remains the same, which consumes area as well as power. Therefore, alternative techniques are required to decrease area and power consumption along with the reconfiguration delays. This work optimizes the configuration memory requirements in the Configurable Logic Block (CLB) of FPGA with SRAM table sharing technique. The SRAM table of a Look-Up-Table (LUT) is shared with one or more LUTs in the same CLB by employing Negation-Permutation-Negation (NPN) classification. Furthermore, the relevant CAD tools are modified to explore the heterogeneous degree of SRAM table sharing within a CLB. For validation, extensive explorations are performed on the 20 largest MCNC benchmark circuits. It has been found that the configuration memory requirements of LUTs are reduced by 30% while retaining the same area, occupancy, and delay. Moreover, it can be further reduced by 50% provided that the FPGA occupancy is allowed to increase by only 15% while retaining the same delay.
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Faculty of Electrical Engineering and Computer Science
Stefan cel Mare University of Suceava, Romania
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