Question

in a parallel in/parallel out shift register, d0 = 1, d1 = 1, d2 = 1, and d3 = 0. after three clock pulses, the data outputs are ________

Explanation:

Step1: Understand parallel - in/parallel - out shift register

In a parallel - in/parallel - out shift register, the data is loaded in parallel and shifted out in parallel. But here we assume a normal shift operation (left - shift or right - shift). Let's assume a right - shift operation.

Step2: Analyze the initial data

The initial data is \(D0 = 1\), \(D1 = 1\), \(D2 = 1\), \(D3 = 0\), which can be represented as the binary number \(1110\).

Step3: Perform right - shift operation for three clock pulses

For each right - shift operation, the bits move one position to the right.
After the first right - shift: \(0111\)
After the second right - shift: \(0011\)
After the third right - shift: \(0001\)

Answer:

\(D0 = 0\), \(D1 = 0\), \(D2 = 0\), \(D3 = 1\)