WorksheetsEMS-LCD-Batch2
Total questions: 10
Worksheet time: 3mins
Name
Class
Date
1.
1. What is the primary purpose of LCD in embedded systems?
a)
Display data
b)
Amplify signals
c)
Control motors
d)
Store data
2.
2. Which function initializes LCD in AVR C programming?
a)
lcd_init()
b)
lcd_start()
c)
lcd_clear()
d)
lcd_set()
3.
3. Which command sets the cursor to the first line of LCD?
a)
0x01
b)
0x02
c)
0x80
d)
0x0C
4.
4. How many control pins are required for basic LCD operation?
a)
1
b)
2
c)
3
d)
4
5.
5. What does RW pin of LCD indicate when set to 0?
a)
Read from LCD
b)
Write to LCD
c)
Reset LCD
d)
Enable LCD
6.
6. What voltage is typically applied to the VEE pin for contrast adjustment?
a)
0V
b)
5V
c)
0–5V through potentiometer
d)
12V
7.
7. Which pin of LCD selects between Command and data register?
a)
RS
b)
RW
c)
E
d)
VCC
8.
8. Which AVR header file is commonly included for LCD interfacing?
a)
avr/io.h
b)
lcd.h
c)
stdio.h
d)
string.h
9.
9. Which command moves the cursor one position to the right?
a)
0x10
b)
0x14
c)
0x18
d)
0x1C
10.
10. What is the function of the E pin in LCD?
a)
Enable read/write
b)
Select data
c)
Adjust contrast
d)
Power supply
100 %
