📖 From An Introduction To Microprocessor 8085 • 10. Programmable Keyboard and Display Interface: 8279 • 13 questions available
Practice MCQs for Block Diagram of 8279. 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. How does the control‑signal combination CS=0, RD=0, WR=1, A1=1, A0=0 affect the 8253?
💡 Difficulty: medium | ✅ Correct: A
Q3. When reading the current count from counter 2, which pins correspond to the address lines A0 and A1?
💡 Difficulty: hard | ✅ Correct: D
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