Flip Flops Quiz: Types and Uses

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Questions and Answers

Which type of flip-flop captures the value of the D-input at a specific point in the clock cycle?

SR flip-flop

T flip-flop

D flip-flop (correct)

JK flip-flop

What is the primary function of a D flip-flop?

To act as a memory cell (correct)

To perform logical operations on inputs

To toggle the output on each clock cycle

To set or reset the output based on inputs

Which type of flip-flop is used to set or reset the output based on specific inputs?

SR flip-flop (correct)

JK flip-flop

T flip-flop

D flip-flop

What is the primary difference between a buffer and a latch?

A buffer always follows its input, while a latch can hold data Signup and view all the answers

What is the primary difference between a latch and a flip-flop?

A flip-flop can hold data, while a latch cannot Signup and view all the answers

What is the purpose of using latches and buffers in input and output interfacing devices?

Both A and C Signup and view all the answers

What is the primary function of a flip-flop?

To store a single bit of data Signup and view all the answers

Which type of flip-flop is commonly used for synchronous designs?

D flip-flop Signup and view all the answers

In an SR flip-flop, what is the output when both S and R inputs are high?

The output is indeterminate Signup and view all the answers

What is the purpose of the clock signal in a D flip-flop?

To control the flow of data into the flip-flop Signup and view all the answers

Which type of flip-flop is considered the most versatile and can be configured to function as various other flip-flops?

JK flip-flop Signup and view all the answers

What is the advantage of using synchronous flip-flops over asynchronous ones in digital design?

Predictable behavior and easier timing analysis Signup and view all the answers

What is the purpose of a tri-state buffer in a bus system?

To prevent data corruption by ensuring only one device can write at a time Signup and view all the answers

What is the function of a D-flip flop in output interfacing?

To temporarily store and synchronize data from the data bus Signup and view all the answers

What is the main characteristic of a flip-flop?

It can have two stable states, representing 0 and 1 Signup and view all the answers

What type of flip-flop is specifically mentioned in the text as being used for output interfacing?

D flip-flop Signup and view all the answers

How many control bits (c0, c1, c2) can be active (1) at the same time without causing a bus conflict?

At most one of them Signup and view all the answers

What is the output state of a tri-state buffer when its control bit is not active?

High-impedance (Z) Signup and view all the answers

Study Notes

Types of Flip-Flops

SR ("set-reset"), D ("data" or "delay"), T ("toggle"), and JK types are common types of flip-flops.

D Flip-Flop

Captures the value of the D-input at a definite portion of the clock cycle (such as the rising edge of the clock).
The captured value becomes the Q output.
At other times, the output Q does not change.
Can be viewed as a memory cell.

Latches and Buffers

Latches (e.g. 74LS374) latch and hold data for input to the controller and output to external devices.
Latches protect the controller from short circuits that might occur in external devices.
Buffers (e.g. 74LS244, 74LS245) are used in interfacing circuitry to input and output data from CPU and external devices.

Tri-State Buffers

Allow control over when an output signal makes it to the bus.
When the control bit is active, the input of the device makes it to the output.
When the control bit is inactive, the output of the device is high-impedance or nothing.

Input and Output Interfacing

Output interfacing: used to output data from the data bus to external devices connected to the controlling system.
Input interfacing: sources of binary information (0, 1) are usually the output of logic gates or other circuits such as switches.

Flip-Flops and Digital Electronics

Flip-flops are a fundamental building block of digital electronics systems used in computers, communications, and many other types of systems.
Flip-flops and latches are used as data storage elements, storing a single bit (binary digit) of data.

Inverters and Buffers

An inverter is a NOT gate, represented by a triangle followed by a circle/bubble (negation).
A buffer is a device whose output will always follow its input.

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Description

Test your knowledge on flip-flops and their common types such as SR, D, T, and JK. Understand how flip-flops capture input values and produce output based on the current state.

Flip-Flops and their Types Quiz

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