Then the number of inputs that the Multiplexer can have is 2 n input Ports. Relationship between Input and Selection PortsĮach Multiplexer can have “n” Selection Ports. Let's see what is the relationship between these two ports. There is some relationship between the number of input and selection ports that a Multiplexer can have. Data Port), Selection Ports, and Output Port. So, there are three ports in this device Input Port (i.e. Selection Ports enable us to select/switch between the available input data and map the corresponding selected input data to the output port. The additional feature of this device is the “selection Ports”. How is Data be selected/switched inside a Multiplexer? This is something similar to an ON/OFF switch in electronic devices. When the Enable Port(E) is “1” à ON, Enable Port is “0” à OFF. Also, there is an Enable Port which means ON/OFF. Multiplexer is a combinational circuit that enables us to select/switch between the available input data and map it to the output port. Just like a normal combinational circuit, the Multiplexer has input and output ports. If you are new here, do check out our previous VHDL tutorials using ModelSim. Let us delve deep into what is a Multiplexer, its specifications, and how can we design one using VHDL on Modelsim. In the digital electronic world, a combinational circuit named “Multiplexer" is a device that is commonly used for the selection process. Now, what if we want to do the same thing with electronics? Is there any device/component that paves the way to select the data depending on our choice? Yes, there is a solution to this question. It’s a cardinal aspect of our life but the main picture here is that we humans have a selection process to compare between our options and reach a conclusion. As a human, if you were asked to select your favourite food or favourite car, how would you compare your choices and conclude an answer? Of course, the answer for the above varies from person to person depending upon their personal preferences and the result will depend on individual choices.
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