INTRODUCTION TO MICROPEOCESSOR
MICRO PROCESSOR AND MICRO CONTROLLER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Address/Data bus (AD0-AD7) is
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Multiplex and bidirectional bus
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Demultiplex and bidirectional bus
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multiplex and unidirectional bus
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Demultiplex and unidirectional bus
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Explanation:
Detailed explanation-1: -Why the lower byte address bus (A0 – A7) and data bus (D0 – D7) are multiplexed? Ans. This is done to reduce the number of pins of 8085, which otherwise would have been a 48 pin chip. But because of multiplexing, external hardware is required to demultiplex the lower byte address cum data bus.
Detailed explanation-2: -Multiplexed AD BUS The signal lines AD0 to AD7 in 8085 microprocessor used for dual purpose. They carry address bits as well as data bits. This is called multiplexed address/data bus.
Detailed explanation-3: -On the 8085 microprocessor, the data bus and the low order address bus are multiplexed. This enables for the utilisation of 8 pins instead of the usual 16.
There is 1 question to complete.