CSC258H1 Lecture Notes - Finite-State Machine, Asynchronous Circuit, Sequential Circuits
Document Summary
Example #1: shift registers: a series of d flip-flops can store a multi-bit value (such as a 16-bit int, data can be shifted into this register 1 bit at a time, over 16 clock cycles, ex. 4-bit shift register used to store 1011 then 0000. Read from q3 to q0: implementing the register with these special d flip-flops will now maintain values in the register until overwritten by setting en high. Example 3: counters: consider the t flip-flop. Output is inverted when input t is high: what happens when a series of t flip-fliops are connected together in sequence, more interesting. Connect the output of one flip-flop to the clock input of the next. Example #2: load registers: one can also load a register"s values all at once, by feeding signals to each flip-flop. Ex. a 4-bit load register: this is a 4-bit ripple counter. Which is an example of an asynchronous circuit.
