A µP-based system which you have prototyped, and written C code for, requires a processor-variant which is no longer available. Which of the following replacement option(s) would be easiest for you to use:

Question

Accepted Answer

A pin compatible processor-variant, which is supported by the same compiler as the original processor-variant, and has the same instruction set/format.

Answer

A processor-variant, which is supported by the same compiler as the original processor-variant, but has a different instruction set, and is supplied in a different package

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A module supplied in the same package, which has the same instruction format as the original processor-variant, but is not pin compatible

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A clone supplied in a different package to the original processor-variant

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An upgraded processor-variant which is backwards compatible (instruction format) with the original, but is not supplied in the same package

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A µP-based system which you have prototyped, and written C code for, requires a ...

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