LCD Interfacing MCQ’s

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This set of Microcontroller Multiple Choice Questions & Answers (MCQs) focuses on “LCD Interfacing”.

1. What can be the sequence of commands that may be used for initializing an LCD?
a) 0x06, 0x0e, 0x01
b) 0x0e, 0x01, 0x80
c) 0x38, 0x0e, 0x01
d) all of the mentioned

2. When the LCD operates in the 4 bit mode, then what more commands are added to it?
a) 33
b) 32
c) 28
d) all of the mentioned

3. In AVR, the LCD operates in two main modes, it can be in 8 bit or 4 bit data.
a) true
b) false
c) depends on the situation
d) can’t be said

4. What is the main function of the LPM instruction used in LCD?
a) for initializing the LCD in the read mode
b) for initializing the LCD in the write mode
c) for sending a long string of characters to the LCD
d) all of the mentioned

5. To latch in information at the data pins of the LCD, we send
a) H-L pulse at the E pin
b) L-H pulse at the E pin
c) A constant H pulse at the E pin
d) A constant L pulse at the E pin

6. What is the address of the second column and the second row of the 2*20 LCD?
a) 0x80
b) 0x81
c) 0xc0
d) 0xc1

7. The RS pin acts as an
a) input pin
b) output pin
c) any of the mentioned depending on the conditions
d) none of the mentioned

8. What is the function of the 0x06 command?
a) to clear the LCD
b) to blink the cursor
c) to shift the cursor to the right
d) for selecting the matrix

9. Which of the following commands takes more than 100 microseconds to run?
a) shift cursor left
b) shift cursor right
c) set address location of the DDRAM
d) clear screen

10. For selecting the data pins in an LCD, RS pin should be
a) 1
b) 0
c) F
d) 10

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