🏠 Home > An Introduction To Microprocessor 8085 > 10. Programmable Keyboard and Display Interface: 8279 > Scanned Sensor Matrix of 8279
← Back to 10. Programmable Keyboard and Display Interface: 8279

📝 Scanned Sensor Matrix of 8279

📖 From An Introduction To Microprocessor 8085 • 10. Programmable Keyboard and Display Interface: 8279 • 9 questions available

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

🔄 Last updated: 2026-07-30

2
Easy Questions
4
Medium Questions
3
Hard Questions

📝 Sample Questions

Q1. Which pin provides the Gate input for counter 0?

🔹 A. Pin 10
🔹 B. Pin 11
🔹 C. Pin 12
🔹 D. Pin 13

💡 Difficulty: easy | ✅ Correct: B

Q2. To read the value of counter 2, which combination of control signals must be set (CS, RD, WR, A1, A0)?

🔹 A. CS=0, RD=0, WR=1, A1=1, A0=0
🔹 B. CS=0, RD=1, WR=0, A1=1, A0=0
🔹 C. CS=0, RD=0, WR=1, A1=0, A0=1
🔹 D. CS=1, RD=0, WR=1, A1=1, A0=0

💡 Difficulty: medium | ✅ Correct: A

Q3. With WR low, CS low, A1=0, and A0=1, which operation occurs?

🔹 A. Load counter 0
🔹 B. Load counter 1
🔹 C. Load counter 2
🔹 D. Write mode word

💡 Difficulty: hard | ✅ Correct: B

⬆️ View all questions in the quiz below

🔗 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
🚀 Start Quiz 📝 Practice Mode