AP-709 Maximizing Performance Using the MCS(R) 251 Microcontroller Programming the 8XC251SB

This application note will describe the programming differences between MCS 51 microcontrollers and the 8xC251SB microcontrollers. The programming differences showed are memory organization, programming registers, addressing mode and instruction sets. Examples of how application codes written for MCS 51 microcontrollers can be optimized using 8xC251SB will also be provided in the following chapters and appendixes section. The state time calculation for the 8xC251SB in the examples are based on the 8xC251SB in source mode and the codes are executed from internal memory.

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