📖 From An Introduction To Microprocessor 8085 • 10. Programmable Keyboard and Display Interface: 8279 • 7 questions available
Practice MCQs for 8253 Timer Chip. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.
🔄 Last updated: 2026-07-30
Q1. Which pin on the 8253 provides the ground connection?
💡 Difficulty: easy | ✅ Correct: A
Q2. What is the effect of asserting the CS (Chip Select) line low while keeping RD and WR high?
💡 Difficulty: medium | ✅ Correct: A
Q3. Why does the 8253 use active‑low signals for CS, RD, and WR instead of active‑high signals?
💡 Difficulty: hard | ✅ Correct: C
⬆️ View all questions in the quiz below