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Microcontroller and Embedded Programming: Interfacing with 8051 Microcontroller
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Microcontroller and Embedded Programming: Interfacing with 8051 Microcontroller
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25 Questions

1. Key press detection and Key identification are:
2. The RS pin is _________ for an LCD.
3. Which instruction is used to select the first row first column of an LCD?
4. INTR, WR signal is an input/output signal pin?
5. For selecting the data pins in an LCD, RS pin should be
6. What is the function of the SCLK pin in MAX1112?
7. What is correct about the BSR mode from below?
8. What is the value of the control register when RESET button is set to zero?
9. Which pin of the LCD is used for adjusting its contrast?
10. The RPM rating given for the DC motor is for?
11. Why do we need a ULN2803 in driving a relay?
12. Why two pins for ground are available in ADC0804?
13. For writing commands on an LCD, RS bit is
14. In ADC0808/0809 IC which pin is used to select Step Size?
15. What can be the sequence of commands that may be used for initializing an LCD?
16. When the LCD operates in the 4 bit mode, then what more commands are added to it?
17. How many data lines are there in a 16*2 alphanumeric LCD?
18. Which of the following statements are true about DAC0808?
19. While programming the ADC0808/0809 IC what steps are followed?
20. Which pins are used to select the ports and the control register?
21. What is the main function of the LPM instruction used in LCD?
22. To detect that in which column, the key is placed?
23. Which command is used to select the 2 lines and 5*7 matrix of an LCD?
24. How many pins of the 8255 can be used as the I/O ports?
25. What is the address of the second column and the second row of the 2*20 LCD?

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