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A 8-bit microprocessor signifies that______.
8-bit address bus
8-bit controller
8-interrupt lines
8-bit data bus
8-bit data bus
An 8-bit microprocessor is defined by the size of its internal data bus, meaning it can process, move, and perform arithmetic operations on 8 bits of data simultaneously. This classification refers to the word length of the CPU's registers and the width of the data path connecting the CPU to memory and I/O peripherals.
An 8-bit microprocessor is defined by the size of its internal data bus, meaning it can process, move, and perform arithmetic operations on 8 bits of data simultaneously. This classification refers to the word length of the CPU's registers and the width of the data path connecting the CPU to memory and I/O peripherals.
N=2┬░n тАФ where N is the number of distinct data values and n is the bus width
MemoryrangeтАЛ=2┬░k тАФ where k is the width of the address bus
The microprocessor's performance and architecture are categorized by its data bus width, denoted as 'n'. For an 8-bit processor, the ALU can perform operations on data bytes (2┬░8=256 possible values) in a single instruction cycle. The data bus acts as the primary highway for transferring these 8-bit packets between the processor, memory, and peripheral devices.
Data bus width determines the word size the CPU can process at once.
Address bus width determines the total addressable memory space (e.g., 16-bit address bus allows 2┬░16=64 KB of RAM).
8-bit processors typically operate on bytes (8 bits).
Historical examples include the Intel 8085 and Zilog Z80.
Low power consumption compared to higher-bit architectures.
Simple architecture and design, suitable for embedded control.
Limited processing speed for complex mathematical calculations.
Restricted memory addressing capabilities due to smaller address bus sizes.
Embedded systems
Consumer electronics (washing machines, microwave ovens)
Industrial controllers
Option A (Address bus) determines how much memory can be accessed, not the data processing capacity.
Option C refers to hardware interrupt capability, which is independent of the processor's data bus width.
An 8-bit architecture is synonymous with 1-byte data width.
D is correct тАФ The term '8-bit' microprocessor specifically indicates that the internal data bus width is 8 bits, allowing the processor to handle 1 byte of data per cycle.
Always distinguish between Data Bus (processing capacity) and Address Bus (memory access capacity); their sizes are often different in the same processor (e.g., 8085 has an 8-bit data bus but a 16-bit address bus).