If you're looking to dramatically boost the performance in your MCS® 51 controller-based design, look no further. The Intel MCS® 251 controller is a direct descendent of the classic MCS 51 architecture, but features state-of-the-art performance and an advanced feature set.

The MCS 251 microcontroller is equipped with a register-based CPU architecture with a 40-byte register file accessible as bytes, words and double words, allowing for programming flexibility as well as increased performance. Its enhanced MCS 51 microcontroller instruction set includes 16- and 32-bit arithmetic and logic instructions, compare and conditional jump instructions, and an expanded set of move instructions that simplify programming, reduce code size and increase performance. The MCS 251 microcontroller has 18 bit linear code/data addressing with 256K Byte extended stack space.

There are also extensive memory options: 512 byte or 1 Kbyte of on-chip data RAM or a choice of 8 or 16 Kbytes of on-chip ROM/OTPROM or ROMless options.

Other reasons to consider a move to the MCS 251 microcontroller:

• High-end performance for embedded applications
• Increased programming flexibility and efficient C language support
• Supports bigger code and data memory requirements
• Reduced code size
• Reduced power consumption and RFI at low clock speeds
• Simple upgrade from MCS 51 and MCS® 151 microcontroller applications

If you want to position your copier, scanner, printer, POS terminal, CD-ROM drive, modem or other PC- or communications-related device at the high end of the performance scale, you need to look at the MCS 251 microcontroller. Your competitors probably are.

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