Select data lines or decode binary addresses.
A multiplexer selects one of 2ⁿ inputs by n select lines; a decoder activates one of 2ⁿ outputs. A MUX can implement any logic function (look-up table). Decoders do address decoding for memory and I/O.
A 4:1 MUX picks one of four sensor readings.
Multiplexers choose one of several inputs and decoders activate one of many outputs, which is how buses, memories and chip selects are organised.
Select data lines or decode binary addresses.
Multiplexers choose one of several inputs and decoders activate one of many outputs, which is how buses, memories and chip selects are organised.
It selects one of its data inputs based on the select lines and passes it to the output.
It converts an n-bit input into one of 2 to the n outputs being active, and it is used for address decoding.
Typical applications include selecting between two sensors with a multiplexer on an ADC input, decoding an address to choose one of eight memory chips and routing data from several sources onto a single bus.
Study "Adders and subtractors" first (topic 41 of 104 in Electronics & Embedded). It covers the groundwork this topic builds on.
Tri-state buses. Demultiplexers. FPGA LUTs are MUXes.
A 4:1 MUX picks one of four sensor readings.
The next topic is "Flip-flops", which builds directly on this one.
It is classed as Intermediate in Electronics & Embedded (topic 42 of 104). It is an intermediate topic. Work through the beginner topics in Electronics & Embedded first.
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