Self-reconfiguration on Spartan-III FPGAs with compressed partial bitstreams via a parallel configuration access port (cPCAP) core

This paper presents an alternative approach for dynamic partial self-reconfiguration that enables a field programmable gate array (FPGA) to reconfigure itself at run-time partially through a parallel configuration access port (cPCAP) under the control of the stand alone cPCAP core within the FPGA instead of using an embedded processor. The cPCAP core with bitstream decompression module needs only 361 slices, which is approximately 18% of a Spartan-3S200 FPGA. The dynamic partial self-reconfiguration via cPCAP core works up to 50 Mbyte/s. The compressed partial bitstream is stored in BlockRAM within the FPGA and decompressed via cPCAP core at the time of reconfiguration of the FPGA. This approach has been implemented on a pure Spartan-3 FPGA from Xilinx, but it can also be used for any other FPGA architectures, such as Virtex-II(Pro), Virtex-4, Virtex-5, etc.