Consider the following statements:In 8085 microprocessor, data - bus and addressbus are multiplexed in order to1. Increase the speed of microprocessor2. Reduce the number of pins.3. Connect more peripheral chips.Which of the above statement is/are correct?a)1 onlyb)2 onlyc)2 and 3d)1, 2 and 3Correct answer is option 'B'. Can you explain this answer?

Question

Answer

Explanation:

Multiplexing of data and address bus in 8085 microprocessor serves the following purposes:

- Reduce the number of pins: By multiplexing the data and address bus, the 8085 microprocessor can use the same set of pins for both data and address transmission. This reduces the total number of pins required on the microprocessor package, making it more cost-effective and easier to integrate into a system.

- Connect more peripheral chips: Multiplexing allows the microprocessor to connect with a larger number of peripheral chips since it can use the same set of pins for multiple purposes. This flexibility enables the microprocessor to communicate with various peripheral devices efficiently.

Therefore, the correct statement is 2 only, as it accurately reflects the primary reasons for multiplexing the data and address bus in the 8085 microprocessor.

Answer

In the 8085 microprocessor, the data bus and address bus are indeed multiplexed, primarily to reduce the number of pins required. Multiplexing allows sharing the same set of physical lines for transmitting both address and data information, which helps in reducing the total number of pins required on the microprocessor chip.

Option 1, which states that multiplexing is done to increase the speed of the microprocessor, is incorrect. Multiplexing the data and address bus does not directly affect the speed of the microprocessor. Speed is determined by factors such as the clock frequency and the internal architecture of the microprocessor.

Option 3, which states that multiplexing is done to connect more peripheral chips, is also incorrect. Multiplexing the data and address bus does not directly affect the ability to connect peripheral chips. The number of peripheral chips that can be connected is determined by factors such as the available address space and the support for peripheral interfacing in the microprocessor.

Therefore, the correct answer is B: 2 only, as multiplexing the data and address bus in the 8085 microprocessor primarily serves to reduce the number of pins required.

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