There are literally dozens of 8-bit

microcontroller architectures and

instruction sets.Modern FPGAs

can efficiently implement practically

any 8-bit microcontroller,

and available FPGA soft cores

support popular instruction sets

such as the PIC, 8051, AVR, 6502,

8080, and Z80 microcontrollers.

The Xilinx PicoBlaze microcontroller

is specifically designed

and optimized for the Virtex and

Spartan series of FPGAs and

CoolRunner-II CPLDs.