Intel MCS(R) 51 Microcontroller 8-bit Architecture Intel's 8-bit MCS(R) 51 family of microcontrollers consists of CHMOS versions of the original 8-bit microcontrollers. The MCS 51 architecture is optimized for control-oriented applications. A variety of fast addressing modes for accessing the internal RAM facilitates byte-processing and numerical operations on small data structures. The instruction set provides a convenient menu of 8-bit arithmetic instructions including multiply and divide instructions. Extensive on-chip support is provided for one-bit variables as a separate data type, allowing direct bit manipulation and testing in control and logic systems that require Boolean processing.
Intel offers a wide variety of MCS 51 microcontroller products with different levels of on-chip peripherals and memory. The MCS 51 microcontroller family includes versions with on-chip EPROM, OTP, and ROM memory as well as CPU-only microcontrollers. Intel's proven CHMOS technology provides lower power, higher integration and higher performance in this line of controllers.