Clock Shift control Clock Shift control SIA SOA SIB SOB Shift register A Shift register B CLK CLK (a) Block diagram CLK TT TT (b) Timing diagram Select one: a. None of them b. Register B=0010 c. Register B=0100 d. Register B=1001 e. Register B=1001
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- There is a clock signal, CLK, which controls the shifting of data in the shift registers. - There is a shift control signal, Shift control, which determines whether the data is shifted or not. Now, let's analyze the block diagram and timing diagram options: a. Show more…
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The shift register in this Figure has SHIFT/LOAD and CLK inputs as shown in part (b). The serial data input SER is a 0. The parallel data inputs are D0=1, D1=0, D2=1, and D3=0 as shown. Develop the data-output waveform in relation to the inputs.
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(a) The SR flip-flop can be converted to a D flip-flop. Illustrate the conversion and block diagram using additional logic gates. (b) The D input and a single clock pulse are shown in Figure Q5b. Compare the resulting Q outputs for positive edge-triggered and negative edge-triggered. The flip-flops are initially RESET. (c) A 3-bit counter has the following counting sequence: 0, 1, 2, 5, 7, 6, 4, 3, 0... repeats. Determine the state transition diagram, MOD number of the counter, and number of states.
Design a 4-bit shift register with the following specifications: - An asynchronous active-low clear (ClrN) - A rising-edge triggered clock (CLK) - An active-high load signal (Ld) with parallel data input (D) - A function select signal (S) - When S = 0, the register shifts right with a serial data input (SI) - When S = 1, the register shifts right with sign extension (copy the sign bit) a) Draw the logic symbol and a truth table for the 4-bit shift register. b) Write a complete VHDL model (entity and behavioral architecture) for the 4-bit shift register. c) Write a VHDL testbench for the 4-bit shift register. Simulate the shift register for the following test sequence: - Load 0011 - Shift right 3 times with S = 0 and SI = 1 - Shift right 2 times with S = 0 and SI = 0 - Clear - Load 1100 - Shift right 2 times with S = 1 and SI = 0
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