![]() Sequential statement are used within a process statement and only if, case, loop and wait statement are allowed within the process statement. Here the VHDL code for implementing 4x1 multiplexer using sequential IF statement is illustrated. A 4x1 multiplexer using concurrent statement was illustrated in the blog post VHDL code for 4x1 multiplexer using concurrent statements. When selector bits s1 and s0 are 00 then output is a, when 01 then output is b, when 10 then output is c and when 11 then the output is d.Ī multiplexer can be designed either using concurrent statement or sequential statement. Their individual bit combination selects either of the 4 inputs. Since there are 4 inputs two selector bits s1 and s0 are required. ![]() ![]() ![]() If a,b,c and d are four inputs then the output z is either one of them as selected by the selector bits. A 4x1 multiplexer has 4 inputs and 1 output. A multiplexer is used select one of the many input and route it to the single output. ![]()
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