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The Intel MCS 51 microcontroller is one of the most widely used 8-bit microcontroller in the world. Many applications today require a high performance 8-bit microcontrollers with more addressing space, register-basedinstructions, larger internal data RAM, more stack space and effective high level language programming. The next generation Intel MCS 251 microcontroller is designed to fulfill the high performance applications requirements andprovide a natural upgrade path for the MCS 51 microcontroller.1.0 INTRODUCTION 42.0 USING CONFIGURATION BYTES...73.0 CODE COMPATIBILITY.... 144.0 WAIT STATE GENERATION 155.0 EXTENDED STACK ... 166.0 TIMING LOOP/SEQUENCE CONSIDERATION .. 177.0 EXTERNAL MEMORY ACCESS .... 208.0 ACCESS TIME FOR I/O PORT .. 239.0 INTERRUPT LATENCY. 2510.0 EXTENDED MEMORY SPACE 2711.0 PAGE MODE DESIGN.. 2912.0 ADDITIONAL REFERENCES... 32
