1. Of the interrupt and polling methods, which one avoids tying down the microco
ID: 2249081 • Letter: 1
Question
1. Of the interrupt and polling methods, which one avoids tying down the microcontroller? 2. When an interrupt occurs, a sequence of events will take place. Which of the following events does NOT belong to this sequence (not correct answer)? a. The instruction will stop the current instruction. b. Save the address of the next instruction. c. The microcontroller tells ISR what to do when interrupt occurs. d. The microcontroller gets the address of the ISR from the interrupt vector and jumps to it. 3. What is the content of D7 (I of the SREG register upon reset, and what does it mean? 4. Add comments to the following interrupt setup codes and fill out the statement. SREG. 0x80; EIMSKI= 0x02; EICRA I= 0x08; The set up will external interrupt to generate interrupt on 5. True or False: The internal interrupts are associated with the microcontroller's peripherals like ADC, Timers, etc.; while an eternal interrupt is any interrupts applied to any of the interrupt pins 6. True or False: Interrupt in ATmega328, when an interrupt occurs, the Global Interrupt Enable bit is set to 1Explanation / Answer
1)polling method avoids trying down the controller
2) a. The instruction will stop the current instruction.
(Whenever interupt comes controller first executive current instruction then takes address of ISR and executive it.)
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