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What is the difference between "program ROM" and "data flash"?

Latest Updated:01/11/2008

Question:

What is the difference between "program ROM" and "data flash"?

Answer:

Both are flash memory with the same structure. The differences between the program ROM and the data flash are memory size and electrical characteristics (which include the number of rewrites and bus cycles). The bus cycle is one cycle of the CPU clock for program ROM, and two cycles of the CPU clock for data flash.
Refer to the electrical characteristics in the hardware manual for more details.
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