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A bi-directional bus between a memory and CPU, possibly has three states. While the bus behaves like a open circuit, the output does not carry a signal in other state it carry signal in both'direction. Which one of the following is 3rd state?
- a)0
- b)1
- c)High impedance
- d)(a) and (c) both
Correct answer is option 'C'. Can you explain this answer?
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A bi-directional bus between a memory and CPU, possibly has three stat...
Three states of bi-directional bus is input data to RAM, output data to RAM and high impedance.
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A bi-directional bus between a memory and CPU, possibly has three stat...
Bi-Directional Bus
A bi-directional bus is a communication pathway that allows data to be transferred in both directions between two devices, such as a memory and a CPU. It is commonly used in computer systems to facilitate the exchange of information.
Three States of a Bi-Directional Bus
A bi-directional bus can have three states, each with its own characteristics. These states are:
1. High: In this state, the bus behaves like an open circuit, meaning that it does not carry a signal. Both the memory and CPU can drive the bus with a high impedance output, effectively disconnecting themselves from the bus.
2. Low: In this state, the bus carries a signal in both directions. The memory and CPU can drive the bus with a low impedance output, allowing the signal to propagate in both directions.
3. High Impedance (Z): This is the third state of the bi-directional bus. In this state, the bus carries a high impedance signal in both directions. The memory and CPU effectively disconnect themselves from the bus, allowing other devices connected to the bus to control the signal. This state is often referred to as the "tri-state" or "high impedance" state.
Choosing the Correct Answer
In the given question, the 3rd state of the bi-directional bus is being asked. The correct answer is option 'C', which states "High impedance". This is because the high impedance state is the state where the bus behaves like an open circuit and does not carry a signal. In this state, both the memory and CPU disconnect themselves from the bus, allowing other devices to control the signal.
Option 'A' (0) and 'B' (1) are incorrect as they are not valid states of a bi-directional bus. Option 'D' (a) and (c) both is also incorrect as option 'A' (0) is not a valid state.
Therefore, the correct answer is option 'C' (High impedance), which represents the third state of a bi-directional bus.
A bi-directional bus is a communication pathway that allows data to be transferred in both directions between two devices, such as a memory and a CPU. It is commonly used in computer systems to facilitate the exchange of information.
Three States of a Bi-Directional Bus
A bi-directional bus can have three states, each with its own characteristics. These states are:
1. High: In this state, the bus behaves like an open circuit, meaning that it does not carry a signal. Both the memory and CPU can drive the bus with a high impedance output, effectively disconnecting themselves from the bus.
2. Low: In this state, the bus carries a signal in both directions. The memory and CPU can drive the bus with a low impedance output, allowing the signal to propagate in both directions.
3. High Impedance (Z): This is the third state of the bi-directional bus. In this state, the bus carries a high impedance signal in both directions. The memory and CPU effectively disconnect themselves from the bus, allowing other devices connected to the bus to control the signal. This state is often referred to as the "tri-state" or "high impedance" state.
Choosing the Correct Answer
In the given question, the 3rd state of the bi-directional bus is being asked. The correct answer is option 'C', which states "High impedance". This is because the high impedance state is the state where the bus behaves like an open circuit and does not carry a signal. In this state, both the memory and CPU disconnect themselves from the bus, allowing other devices to control the signal.
Option 'A' (0) and 'B' (1) are incorrect as they are not valid states of a bi-directional bus. Option 'D' (a) and (c) both is also incorrect as option 'A' (0) is not a valid state.
Therefore, the correct answer is option 'C' (High impedance), which represents the third state of a bi-directional bus.
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A bi-directional bus between a memory and CPU, possibly has three states. While the bus behaves like a open circuit, the output does not carry a signal in other state it carry signal in both'direction. Which one of the following is 3rd state?a)0b)1c)High impedanced)(a) and (c) bothCorrect answer is option 'C'. Can you explain this answer?
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