Microcontroller Mock Test 3

10%

Question 1 of 10

1. How many pins of the 8255 can be used as the I/O ports?

Question 1 of 10

Question 2 of 10

2. State which of the following statements are false?

INTR pin tells about the end of the conversion

None of the mentioned

ADC0804 IC is an 8 bit parallel ADC in the family of the ADC0800 series

CLK IN pin used for External Clock Input or Internal Clock with external RC element

Question 2 of 10

Question 3 of 10

3. What is the value of the control register when RESET button is set to zero?

0x00H

value remains the same

0x11H

0xFFH

Question 3 of 10

Question 4 of 10

4. What is the function of the WR pin?

its active high input used to inform ADC0804 to the start of conversion

its active high input used to inform ADC0804 to the end of conversion

its active low input used to inform ADC0804 to the end of conversion

its active low input used to inform ADC0804 to the start of conversion

Question 4 of 10

Question 5 of 10

5. What are optoisolators?

it is a device that can be used as an electromagnetic relay without a driver

none of the mentioned

it is a thing isolated from the entire world

it is a driver

Question 5 of 10

Question 6 of 10

6. Which of the following statements are true about DAC0808?

parallel digital data to analog data conversion

all of the mentioned

none of the mentioned

it has current as an output

Question 6 of 10

Question 7 of 10

7. While programming the ADC0808/0809 IC what steps are followed?

select the analog channel, start the conversion, monitor the conversion, display the digital results

select the channel, start the conversion, end the conversion

select the analog channel, activate the ALE signal (L to H pulse), start the conversion, monitor the conversion, read the digital results

select the analog channel, activate the ALE signal (H to L pulse), start the conversion, monitor the conversion, read the digital results

Question 7 of 10

Question 8 of 10

8. Name the read only registers are present in the DS12887?

Question 8 of 10

Question 9 of 10

9. In DS12887, what is correct about the UIP bit of the register A?

it is used to select the DS12887 datasheet

it is used to know about the result

all of the mentioned

it is a read only bit

Question 9 of 10

Question 10 of 10

10. Which pins are used to select the ports and the control register?

All of the mentioned

Question 10 of 10