INTRODUCTION TO MICROPEOCESSOR
MODEL OF MICROPROCESSOR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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20
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16
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5
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4
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Detailed explanation-1: -Since one hex digit can represent 4 binary bits, it will take 5 hex digits to represent the 20-bit address of a memory location.
Detailed explanation-2: -For a 20-bit address: we have 5 hexadecimal digits that go from 0x00000 to 0xFFFFF.
Detailed explanation-3: -An even more efficient way to represent memory is hexadecimal form. Here, each digit represents a value between 0 and 16, with values greater than 9 replaced with the characters a to f. A single hexadecimal digit corresponds to 4 bits, so each byte of memory requires only 2 hexadecimal digits.
Detailed explanation-4: -Address Bus Size For example, a 20-bit address bus can access up to one megabyte (1MB); 24 bits reaches 16MB, and 32 bits can handle four gigabytes (GB). See binary values.
Detailed explanation-5: -Address Explanation There are four hexadecimal digits that make up every 16 bits of the address, thus resulting in 8 groups of hexadecimal digits, each separated by colons.