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📝 INTEL Programmable Interval Timer 8253

📖 From An Introduction To Microprocessor 8085 • 9. Programmable Interval Timer/Counter: 8253 • 6 questions available

Practice MCQs for INTEL Programmable Interval Timer 8253. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-30

Easy Questions

Medium Questions

Hard Questions

📝 Sample Questions

Q1. What is the maximum clock frequency supported by the 8253?

🔹 A. 1 MHz

🔹 B. 2 MHz

🔹 C. 4 MHz

🔹 D. 8 MHz

💡 Difficulty: easy | ✅ Correct: B

Q2. How does the gate input affect the operation of a counter in the 8253?

🔹 A. It disables counting

🔹 B. It selects binary vs BCD

🔹 C. It enables counting

🔹 D. It sets the initial count value

💡 Difficulty: medium | ✅ Correct: C

Q3. Why might a designer choose BCD counting mode over binary mode in the 8253?

🔹 A. BCD mode simplifies interfacing with decimal displays

🔹 B. Binary mode provides higher speed

🔹 C. BCD mode consumes less power

🔹 D. Binary mode allows larger count range

💡 Difficulty: hard | ✅ Correct: A

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🔗 Related Topics

📝 Block Diagram of 8253 📝 Logics for Counters of 8253 📝 Control Word Format of 8253 📝 8253 Interfacing and Programming 📝 Programming of 8253 in Mode 0: Interrupt on Terminal Count

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