Q2Microprocessor and Microcontroller
Question
2 marks
What is the role of accumulator in microprocessor?
Answer
The Accumulator (Register A) is the primary 8-bit working register universally mandated for all arithmetic and logical operations.
In the 8085 microprocessor architecture, the Accumulator (formally designated as Register A) is the absolute central 8-bit working register. It is structurally hardwired directly into the ALU. Almost all arithmetic operations (ADD, SUB) and logical operations (AND, OR) strictly mandate that at least one operand must initially reside within the Accumulator, and the final mathematical result is universally stored back into the Accumulator.