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Module 3: Embedded Microcontrollers – PIC18F / Others

2025?m

Which of the following is NOT part of a typical microcontroller?
(i) CPU
(ii) RAM
(iii) I/O Ports
(iv) Hard Disk

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Answer

Correct option: (iv) Hard Disk

Explanation

A typical microcontroller integrates essential computing and control resources on a single chip, such as:

  • CPU: Executes program instructions.
  • RAM: Temporarily stores variables and runtime data.
  • I/O ports: Interface with sensors, actuators and external devices.
  • Timers/counters: Generate timing functions and count events.
  • Peripherals: May include ADC, communication interfaces, PWM and other modules.

A hard disk is a separate mass-storage device and is not normally an integrated component of a microcontroller.

Therefore, the correct answer is (iv).

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