Simple state machine

Design a sequential network described by the following state/output table (PS: Present State; NS: Next state, $z$ is the 2-bit output). Assume $A$ is the initial state and encode the outputs as $a=00$ , $b=01$ and $c=10$ .

PS	Input
	$x=0$	$x=1$
$A$	$B,a$	$F,b$
$B$	$C,a$	$A,c$
$C$	$D,a$	$B,b$
$D$	$E,b$	$C,c$
$E$	$F,b$	$D,b$
$F$	$A,c$	$E,c$
	$\textit{NS},z$

Specification

module state_machine(x, z, clk, rst);
    input x, clk, rst;
    output [1:0] z;

Input

clk is the clock signal.
rst is the synchronous reset signal.
x is the input signal.

Output

z is the 2-bit signal encoding the outputs $a$ , $b$ and $c$ .

Problem information

Author: Jordi Cortadella

Generation: 2026-02-03T12:22:29.785Z