Q. How many data lines are there in a 16*2 alphanumeric LCD?

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Q. Which pin of the LCD is used for adjusting its contrast?

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Q. For writing commands on an LCD, RS bit is

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Q. Which command of an LCD is used to shift the entire display to the right?

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Q. Which command is used to select the 2 lines and 5*7 matrix of an LCD?

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Q. What changes are to be made to send data to an LCD?

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Q. For reading operation from an LCD what changes in the software are introduced?

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Q. Which instruction is used to select the first row first column of an LCD?

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Q. The RS pin is an input or output for a controller?

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Q. Which of the following steps detects the key in a 4*4 keyboard matrix about the key that is being pressed?

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Q. What is described by this command: CJNE A,#00001111b, ROW1

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Q. To detect that in which column, the key is placed?

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Q. In reading the columns of a matrix, if no key is pressed we should get all in binary notation

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Q. If we need to operate a key of a keyboard in an interrupt mode, then it will generate what kind of interrupt?

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Q. To identify that which key is being pressed, we need to:

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Q. Key press detection and Key identification are:

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Q. Why two pins for ground are available in ADC0804?

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Q. When is the function of the WR pin?

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Q. State which of the following statements are false?

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Q. While programming the ADC0804 IC what steps are followed?

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