Question

5. REVIEW QUESTIONS 1. Can S-R latches be used to create D Flip-Flops? If so, how? 2. What is the difference between the Serial-In Serial-Out, Serial-In Parallel-Out, Parallel-In Serial-Out, and Parallel-In Parallel-Out Shift Registers? 3. How many Shift Register stages are required to store a 16-Bit Binary Number? 4. What devices would you use to interface a 16-Bit Binary Number to a Serial-In Serial-Out Shift Register at the Input and Output of the Register?

Answer 1

1) No.A latch doesn't have a clock but a flip-flop does .. but conversion from Sr flip-flop to d Flip-flop is possible...so without using a clock we can't convert Sr latch to d flip-flop because if we use clock then it will become conversion from Sr Flip-flop to d flip flop..

2) serial in serial out: Data is given as input only 1 bit at a time also only 1 bit is available at output.

Serial in parallel out: Here data is sent in 1 bit at a time but output is available parallely.i.e all bits are available. ( Used in Serial to parallel converter)

Parallel in serial out : In this case data is sent into shift register parallely but output is available serially I.e one bit at a time . ( Used in parallel to serial converter)..used in A/D converters..

Parallel in parallel out : Here all bits are given simultaneously i.e parallely and also available at a time at the output ..

3)shift registers are series of flip-flops ..a shift register can be designed with desired number of flip-flops .and each Flip-flop can store 1 bit. In general case a shif register has 4 flip flops sk this case we need 4 shift registers to store 16 bit binary number.

4) we have binary data generators available in the form of kits ..they can be used at input of shift register..at output we can use a digital display..

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