MICROPROCESSOR AND MICROCONTROLLER

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INTRODUCTION TO MICROPEOCESSOR

MICROPROCESSOR BASICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A 16-bit Mp reads 2-byte data, size by:
A
Two bus cycles
B
Single bus cycle
C
Four bus cycles
D
16-state
Explanation: 

Detailed explanation-1: -Since 216 is 65, 536, a processor with 16-bit memory addresses can directly access 64 KB (65, 536 bytes) of byte-addressable memory.

Detailed explanation-2: -A 16-bit microprocessor can process data and memory addresses that are represented by 16 bits. bus : indicates the number of wires in the bus. A 16-bit bus transmits 16 bits in parallel.

Detailed explanation-3: -The 16-bit wide external data bus processor can transfer two Bytes in a bus cycle and the 8-bit wide external data bus processor can transfer one Byte in a bus cycle if all instructions and operands are two Bytes. The 16-bit processor’s maximum data transfer rate is therefore twice as fast as the 8-bit processor’s.

Detailed explanation-4: -16 address bits, 16 address pins The memory on these CPUs is addressable at the byte level. This leads to a memory addressable limit of 216 × 1 byte = 65, 536 bytes or 64 kilobytes.

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