AP-710 Migrating from the MCS(R) 51 Microcontroller to the MCS 251 Microcontroller (8XC251SB)--S/W and H/W Consid.

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-based instructions, 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 and provide a natural upgrade path for the MCS 51 microcontroller.

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