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The Xilinx PicoBlaze is a compact, capable, and cost-effective fully embedded 8-bit RISC microcontroller core optimized for the Xilinx Spartan™-3, Virtex™-II, Virtex-II Pro™ and Virtex-4 FPGAs and CoolRunner™-II CPLDs


  • Predictable performance, always two clock cycles per instruction, up to 200 MHz or 100 MIPS in a Virtex-4? FPGA and 88 MHz or 44 MIPS in a Spartan-3 FPGA
  • 16 byte-wide general-purpose data registers
  • 1K instructions of programmable on-chip program store, automatically loaded during FPGA configuration
  • Byte-wide Arithmetic Logic Unit (ALU) with CARRY and ZERO indicator flags
  • 64-byte internal scratchpad RAM
  • 256 input and 256 output ports for easy expansion and enhancement
  • Automatic 31-location CALL/RETURN stack
  • Assembler, instruction-set simulator support

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