Question

A microcontroller differs from a microprocessor in that it has

• A. on-chip memory and on-chip ports
• B. only on-chip memory but not on-chip ports
• C. only on-chip ports but not on-chip memory
• D. neither on-chip memory nor on-chip ports

Hint:

Microcontroller = CPU + Memory + I/O on a single chip.

Answer 1

The Correct Option is A

Concept: A microcontroller is a compact integrated system designed to perform specific control tasks.

Step 1: Microprocessor structure A microprocessor mainly contains CPU only and requires external components like memory and I/O ports.

Step 2: Microcontroller structure A microcontroller integrates CPU, memory, and I/O ports on a single chip.

Step 3: Memory inclusion It includes RAM and ROM/Flash internally.

Step 4: I/O ports inclusion It also has built-in input/output ports for direct interfacing.

Step 5: Conclusion \[ \boxed{\text{On-chip memory and on-chip ports}} \]

Final Answer: \[ \boxed{(A)} \]