Question: What kind of structure does the memory organization of the 8051 microcontroller adopt? How is the memory address space divided and what is its capacity? How is it used and what are its capacity? What are its characteristics in use?
Answer: (1) Structural characteristics of the 80C51
The 80C51 adopts a structure that clearly separates the program memory and the data memory and addresses them separately, which is called the Harvard structure.
(2) Physical and logical address space
The memory has four memory spaces: on-chip program memory, off-chip program memory, on-chip data memory, and off-chip data memory.
Logically, there are three memory address spaces: a unified 64KB program memory address space on-chip and off-chip, a 256KB data memory address space on-chip, and a 64KB data memory address space off-chip.
(3) Access format
The MOV format is used to access the on-chip RAM
The MOVX format is used to access the off-chip RAM
Reference address：What kind of structure does the memory organization of 8051 microcontroller use?
Answer: (1) Structural characteristics of the 80C51
The 80C51 adopts a structure that clearly separates the program memory and the data memory and addresses them separately, which is called the Harvard structure.
(2) Physical and logical address space
The memory has four memory spaces: on-chip program memory, off-chip program memory, on-chip data memory, and off-chip data memory.
Logically, there are three memory address spaces: a unified 64KB program memory address space on-chip and off-chip, a 256KB data memory address space on-chip, and a 64KB data memory address space off-chip.
(3) Access format
The MOV format is used to access the on-chip RAM
The MOVX format is used to access the off-chip RAM
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