MCS(R) 251 Architecture Overview

MCS 251 architecture is the next generation of Intel MCS 51 architecture that increases system performance by a factor of five using existing MCS 51 microcontroller code. By rewriting code using the MCS 251 architecture instructions, designers can increase performance up to 15 times. The new MCS 251 architecture brings high performance, an increased memory mix and addressing, low power, low noise, efficient high level language support, enhanced instruction set, integrated features and functionality to the 8-bit embedded control market segment. All products in the family will be built around the new MCS 251 architecture core. They will have various peripherals, memories, input/ouput (I/O) ports, and a BIU (Bus Interface Unit). Most importantly, new proliferations will be binary code-compatible with existing 8051 components. Software investment is protected while providing an easy performance upgrade path.

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