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📝 Program Clock of 8279

📖 From An Introduction To Microprocessor 8085 • 10. Programmable Keyboard and Display Interface: 8279 • 10 questions available

Practice MCQs for Program Clock of 8279. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-30

2
Easy Questions
5
Medium Questions
3
Hard Questions

📝 Sample Questions

Q1. Which pin is the ground terminal for the 8253 chip

🔹 A. Pin 10
🔹 B. Pin 12
🔹 C. Pin 21
🔹 D. Pin 24

💡 Difficulty: easy | ✅ Correct: B

Q2. What purpose does the active low CS signal serve in the 8253 timer

🔹 A. It disables the device when high
🔹 B. It enables the device when low
🔹 C. It provides a clock pulse
🔹 D. It selects counter number

💡 Difficulty: medium | ✅ Correct: B

Q3. In the control signal table which combination results in loading counter 2

🔹 A. CS low RD high WR low A1 high A0 low
🔹 B. CS low RD high WR low A1 low A0 high
🔹 C. CS low RD low WR high A1 high A0 low
🔹 D. CS low RD low WR high A1 low A0 high

💡 Difficulty: hard | ✅ Correct: B

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🔗 Related Topics

📝 INTEL Programmable Keyboard/Display Interface 8279📝 Block Diagram of 8279📝 Functional Description of 8279📝 Key Board San of 8279📝 Scanned Keyboard of 8279
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