First AVR Microcontroller Quiz

Which is the prohibited state/ condition in S-R latch and needs to be avoided due to unpredictable nature of output?

• a. S = R = 0

• b. S = 0, R = 1

• c. S = 1, R = 0

• d. S = R = 1

The truth table for an S-R flip-flop has how many VALID entries?

• a) 1

• b) 2

• c) 3

• d) 4

What do you write if you want to set only PA3 in PORTA to 1?

• PORTA = PA3;

• PA3=PORTA;

• PORTA |= (1<<PA3);

• PORTA = (1<<PA3);

What do you write if you want to set only PA3 in PORTA to 0?

• PORTA = 0;

• PA3=0;

• PORTA |= (0<<PA3);

• PORTA &= ~(1<<PA3);

Which register determines whether PORTB Pin 3 is an output or an input?

• DDRB

• PORTB

• PINB

• DPB

Which are Registers for Digital IO of the Port B?

• PORTB

• PINB

• DB

• DDRB

On a positive edge-triggered S-R flip-flop, the outputs reflect the input condition when ________

• a) The clock pulse is LOW

• b) The clock pulse is HIGH

• c) The clock pulse transitions from LOW to HIGH

• d) The clock pulse transitions from HIGH to LOW