INTRODUCTION TO MICROPEOCESSOR
MODEL OF MICROPROCESSOR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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At what PIN number, there is EA pin which stands for External Access input?
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PIN 28
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PIN 29
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PIN 30
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PIN 31
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Explanation:
Detailed explanation-1: -Pin 30 − This is EA pin which stands for External Access input. It is used to enable/disable the external memory interfacing.
Detailed explanation-2: -Pins 10 to 17 − these pins are known as Port 3. This port serves some functions like interrupts, timer input, control signals, serial communication signals RxD and TxD, etc. Pins 18 & 19 − these pins are used for interfacing an external crystal to get the system clock.
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