Mostly due to the fact that we need to share ports in order to achieve this configuration.
PARALLEL TO SERIAL CONVERTER USING D FLIP FLOP HOW TO
4-bit PIPO shift register How to design a 4-bit Parallel in Serial Out shift register (PISO)? The resulting logic circuit for the 4-bit PIPO shift register is as follows. Hence, we will connect the input ports (D ports) of the flip-flops to the input pins.Įventually, we will connect the clock ports to the clock input and the reset ports to the reset inputs. The name suggests that we have parallel inputs too. Let’s straightaway connect the output ports (Q ports) of the D flip-flops to the output pins. 4-bit SIPO shift register How to design a 4-bit Parallel in Parallel Out shift register (PIPO)?Īgain repeating the same approach we saw earlier, we will go ahead with cues from the title. That settles the serial input part.įinally, apply the clock and the reset signal and voila you have your 4-bit SIPO shift register. Connect all the remaining flip-flops’ outputs to their subsequent flip-flops’ input. Similarly, take a single output from the last flip-flop. Give a single input to the first flip-flop. Let’s take the four D flip-flops and take outputs from each individual flip-flop. The timing diagram of data shift through a 4-bit SISO shift register How to design a 4-bit Serial In Parallel Out shift register (SIPO)? Furthermore, at the fourth clock pulse, we will get the 1-bit data “1” at the output Q4, having undergone a successful shift. In the next clock cycle it will be taken as input by the D2 flip-flop and will be available at Q2 output and so on. This input port is to the first flip-flop in the register. Since we have a serial input, we will take only one input port. And all of them have the same reset input.
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Okay, so we know that we have four D flip-flops. How to design a 4-bit Serial In Serial Out shift register (SISO)?
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So we have two ways in which data can ‘flow’ through a shift register. Similarly, each flip-flop can have its own output too. This particular setting of giving input is known as parallel input.