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Memory Areas

The 8051 architecture supports several physically separate memory areas or memory spaces for program and data. Each memory area offers certain advantages and disadvantages. There are memory spaces that may be:

  • read from but not written to.
  • read from or written to.
  • read from or written to more quickly than other memory spaces.

The wide variety of memory space available on the 8051 is quite different from most mainframe, minicomputer, and microcomputer architectures where the program, data, and constants are all loaded into the same physical memory space within the computer. Refer to the Intel 8-Bit Embedded Controllers data book or other 8051 data books for more information about the 8051 memory architecture.

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