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Ewlyahoocom (talk | contribs) {{mergeto|Memory-mapped I/O}} |
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Sometimes only partial address decoding is used, meaning that the device effectively occupies a much larger block of memory space than is strictly necessary. This can be a problem if the memory space is small (e.g. with a 16-bit address bus which can only address 65,536 different locations).
Memory mapping also hogs the address and data buses if the mapped device is slower than true memory (as for instance, a [[Successive Approximation ADC|successive approximation A-to-D converter]] might well be).
[[Category:Microprocessors]]
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