Shift Registers using Flipflops.

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Shift Registers using Flipflops

• CEC

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Contents

• Shift Registers.
• Serial in Serial out Shift Registers.
• Serial in Parallel out Shift Registers.
• Parallel in Serial out Shift Registers.
• Parallel in Parallel out Shift Registers.
• Applications.

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Shift Registers

• Registers to store bits.
• Shift registers temporarily store bits and shift
  it.
• Comprise of a chain of flipflops.
• Data can be entered in serial or parallel.
• Data can be shifted out in serial or parallel.
• Data can be shifted to the left or right.
• Clock pulse to shift data bit by bit.

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IC 7474 D Flipflop

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Serial in Serial out Shift Register(SISO)

• Output of one flipflop connected to the input of
  the next flipflop.
• Final output bits from the last flipflop.
• Bit by bit loading and shifting with every clock
  pulse.
• Direction of shift depends on the method of
  interconnections.

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SISO
FF0
FF1
FF2
FF3
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Serial in Parallel out Shift Register(SIPO)

• Output from all flipflops simultaneously.
• Shifts one bit per clock pulse.
• Shifted value shown at once.
• Direction of shift depends on wiring
  configuration.

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SIPO

FF0
FF1
FF2
FF3
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Parallel in Parallel out Shift Register (PIPO)

• Data loaded in parallel into all flipflops.
• Data taken out in parallel from all flipflops.
• Clock driven.
• Useful for temporary storage of data.
• Delays data by one clock pulse.

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PIPO
FF0
FF1
FF2
FF3

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Parallel in Serial out Shift Register(PISO)

• Load/Shift control.
• Data clocked into all flipflops in parallel.
• Data shifted with every clock pulse.
• Output from the last flipflop.

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PISO
FF1
FF3
FF0
FF2
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PISO
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Applications of Shift Registers

• Arithmetic and Logical Operations.
• Delaying bits.
• Temporary storage and shifting.
• Parallel to Serial Conversion.
• Serial to Parallel Conversion.

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Procedure
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Youtube Videos

• https//www.youtube.com/watch?v9bV9otTD6ls
• https//www.youtube.com/watch?v1i_4XCWdgwY
• https//www.youtube.com/watch?v1zxXZ3qVpBM
• https//www.youtube.com/watch?vOmAsf5usnzA

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Thank You