We know that the memory cells in a sequential circuit saved the circuit.
States, however, what are the states in a sequential circuit?
This lecture concisely answers this question.
More detail and usage of states will be explained along the course.
As we noticed in previous lectures, in contrast to the combination of circuits, the behavior of the
control circuits depends not only on the current inputs, but also on the past inputs and outputs.
Flipflops serves to keep track of these past inputs and outputs at each time.
The value is stored in flipflops.
At each time it's called the state of the sequential circuit.
In other words, states encapsulate the past inputs and outputs up to the specific time.
Therefore, the transitions between states can describe the behavior of the sequential circuit.
Later in this course, I will explain how to use the state transition model through a finite state machine
or FSM for short to design a wide range of sequential circuits.
In this lecture, I'm only focusing on basic ideas.
Let's consider a single flip flop, its output can have two states corresponding to zero and one logic
values are used as zero and as one to name these states.
The flip flop changes its state and the rising edge of the clock if the proper value appears on the
input signal.
For example, if flipflop is in zero state, then the next state would be as one.
If these were apparently for the transition from S1 to a zero, the input data should be zero on the
rising edge of the clock.
In other cases, the flipflop keeps its current state.
To simplify the state transition diagram, visually draw only the transitional state links and the value
of inputs and outputs.
In the general case, the sequential circuit with end memory cells can have peer states, which at most
is due to the power of an.
Each state diagram should have a starting state from which the state transitions are started to perform
a specific task.
Usually we should have at least a path from each state to this Astarte state in order to receive the
circuit, usually a recent signal in sequential circuits has a responsibility to putting the circuit
into a known state.
What is the is that signal characteristics and how to define that in the next lecture will answer these
questions.
These are our takeaway messages, this sets up a sequential circuit are defined by the logic values
of its memory cells.
The transitional state diagram can describe the behavior of a wide range of sequential circuits as they
transition can occur by changes on the circuit clerk's signal and or the input signals.
Now, the police question the road as they transition of the following search.