Max. RAM supported by a Uc

How can we say how much ROM is supported by a Uc?

For example,for 8051,what is the maximum ROM that it can supports?

Thanks in advance...

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  • "How can we say how much ROM is supported by a Uc?"

    You study the particular Datasheet for the specific chip in question.

    "for 8051, what is the maximum ROM that it can supports"

    The processor cannot distinguish ROM from RAM from any other memory type - all the processor knows is how much memory it can address.

    So the limitation is the availability of address lines - again, you will have to study the particular Datasheet to determine what is available on any specific chip.

    Techniques such as "paging" or "banking" can be used to extend a chip's "natural" address range - although unlikely to be worthwhile these days.

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  • "How can we say how much ROM is supported by a Uc?"

    You study the particular Datasheet for the specific chip in question.

    "for 8051, what is the maximum ROM that it can supports"

    The processor cannot distinguish ROM from RAM from any other memory type - all the processor knows is how much memory it can address.

    So the limitation is the availability of address lines - again, you will have to study the particular Datasheet to determine what is available on any specific chip.

    Techniques such as "paging" or "banking" can be used to extend a chip's "natural" address range - although unlikely to be worthwhile these days.

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