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251 Memory Layout

The following figure shows the memory layout of the 251 architecture.

80251 Memory Layout

The 251 completely supports all aspects of the classic 8051 memory layout and instruction set. Existing 8051 programs can be directly execute on the 251. The four 8051 memory spaces (DATA, IDATA, CODE and XDATA) are mapped into specific regions of the 16 MB address space.

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