📝 Programming of 8253 in Mode 2: Rate Generator

Q1. An 8253 timer is driven by a 1.193 MHz crystal. To obtain a 1 ms periodic interrupt using Mode 2, what initial count value must be loaded into the counter?

💡 Difficulty: easy | ✅ Correct: A

Q2. A motor controller requires a 50 Hz square wave. The system clock feeding the 8253 is 2 MHz and Mode 2 will be used. Which initial count should be programmed?

💡 Difficulty: medium | ✅ Correct: B

Q3. What is the maximum clock frequency at which the original 8253 can reliably operate?

💡 Difficulty: hard | ✅ Correct: B