Question

Which of the following step/s is/are correct for sending data to an LCD?

(a) set the R/W bit

(b) set the E bit

(c) set the RS bit

(d) all of the mentioned

I got this question in unit test.

I'd like to ask this question from LCD Interfacing in chapter 8051 Microcontroller of Microcontroller

Answer 1

Right option is (d) all of the mentioned

For explanation I would say: To send data to an LCD, RS pin should be set so that LCD will come to know that it will receive data which has to display on the screen. R/W pin should be reset as data has to be displayed (i.e. write to the LCD). High to low pulse must be applied to the E pin when data is supplied to data pins of the LCD.