An ARM7 processor with the Modified Multiplier and the Flip-Flop Based Pipelines

The flip-flop base ARM7 core is designed and fabricated with 0.18 mum CMOS process. The designed processor core can be easily synthesized with the various CMOS libraries because it doesn´t have the clock skew and race problem. The conventional ARM7 core has 32times8 multiplier, but we modified the multiplier with 32times16 type to improve the performance of the core. The multiplier is optimized in the point of the operating speed and the gates count. The fabricated chip is tested by the various methods, such as the single instruction test and the instruction combination test, and the application programs. According to the test results, the designed processor carries out the 462 instructions of the processor and the several application algorithms, and the operating at the 98 MHz clock rate.