📖 From An Introduction To Microprocessor 8085 • 11. Programmable Interrupt Controller: 8259 • 27 questions available
Practice MCQs for Block Diagram of 8259. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.
🔄 Last updated: 2026-07-30
Q1. Which pin is designated as the ground terminal on the 8253 device?
💡 Difficulty: easy | ✅ Correct: B
Q2. A CPU wants to load a new count into counter 0. Which combination of control signals must be asserted?
💡 Difficulty: medium | ✅ Correct: A
Q3. Design a 24‑bit timer by cascading three 8253 counters. Which pins must be connected together to achieve proper chaining?
💡 Difficulty: hard | ✅ Correct: A
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