After a certain number of iteration, you will get the states values which is same as the initial states.Output sequence tend to be like random sequence (Pseudo random).If the initial states is same, you will always get the same output sequence (meaning Output sequence is deterministic).
That's why it is called Linear Feedback Shift Register as illustrated below. LFSR is a shift register circuit in which two or more outputs from intermediate steps get linearlyĬombined and feedback to input value.