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Home › Microprocessors & Microcontrollers › The four 8-bit ports of the classic 8051 provide a total of how many I/O lines?
MCQ Practice Question
Microprocessors & Microcontrollers8051 I/O

The four 8-bit ports of the classic 8051 provide a total of how many I/O lines?

  • A8
  • B16
  • C24
  • D32
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Correct Answer: D. 32
Explanation: Four ports × 8 bits per port = 32 I/O lines.
Reference: Standard microprocessors and microcontrollers: 8051 i/o
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