Question: 4. Given the following code: a. What is this function called? (2) b. What does the code do? ISR(INT1_vect) { cli(); = PINB 0xAA;

4. Given the following code: a. What is this function called? (2) 

4. Given the following code: a. What is this function called? (2) b. What does the code do? ISR(INT1_vect) { cli(); = PINB 0xAA; cntZero++; sei(); }

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