Experiment 5 - 4-bit Shift Register with RESET Input

With the RESET input you are able to put the entire shift register instantaneously to "0". For many applications of the shift register this is an important feature...

Take a look at the circuit diagram. The RESET input is using the asynchronous inputs (SET/RESET) of the individual D flip-flops.

Circuit diagram of a 4-bit shift register with reset input.

You can push at all times the RESET pushbutton switch S2, regardless of the clock signal Ckl. As a result you put the entire shift register immediately to "0"

Circuit of a 4-bit shift register with reset input. (Enlarge)

In many circuit diagrams the RESET input is referred to as CLEAR input...

In the next experiments you look at some more concepts of the shift register...