What Is a Shift Register?
A shift register is a device used to store multiple data bits and sequentially move (shift) these bits.
It is widely used for tasks such as data reordering and shift operations (shifting data left or right). For example, it can be helpful when temporarily storing data before outputting it again or when rearranging the order of data. Additionally, it is used as an interface for transferring data between other circuits or devices. For instance, it is used for exchanging data between the CPU and memory in a computer.
There are various types of shift registers, with the most common being the “serial input/serial output” (SISO) type. In this type, one bit is inputted and outputted sequentially in a temporal manner.