MICROPROCESSOR AND MICROCONTROLLER

MICROPROCESSOR 8086

ARCHITECTURE OF 8085

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which pin of the LCD is used for adjusting its contrast?
A
VEE
B
VDD
C
EN
D
RS
Explanation: 

Detailed explanation-1: -The VEE pin is used to adjust the display contrast. We can use a potentiometer to connect VEE to a suitable positive voltage below +5 V. The Led+ and Led-pins are used to turn on the display backlight (connect them to +5 V and ground, respectively). The RS pin is the Register Selector pin for the LCD controller.

Detailed explanation-2: -Explanation: The RS pin of the LCD is used for selecting a particular register used for sending a command or the data to the LCD.

Detailed explanation-3: -RS is the register select pin used to write display data to the LCD (characters), this pin has to be high when writing the data to the LCD. During the initializing sequence and other commands this pin should low.

Detailed explanation-4: -The RS (data/instruction select) bit tells the LCD whether we are going to send an instruction or a piece of data. The R/W (read/write) bit tells the LCD whether we wish to read from or to write to RAM. The E (enable) bit tells the LCD when it should read the data lines.

There is 1 question to complete.