exas Southern University Department of Engineering (Electrical & Computer) ELET4

Question

exas Southern University Department of Engineering (Electrical & Computer) ELET431: Microprocessor Interfacing Spring 2017: Practice Questions for the Final Examination SECTION A In order to send data to the LCD to be displayed, set RS and pulse to E pin? 2 To read the busy flag of the LCD, what should be the status ofRS and RW bits 3) A stepper motor translates pulses into 40 The stepping action ofa stepper motor is controlled by 5 lfa motor takes 60 steps to make one complete revolution, then what is the sep angk? 60 In a 4-sequence tepper motor with 100 Rteps Per revolution, the rotor has 70 Which of the following is true about the RD and WR pins on the ADC0848? and RD pins? 90 On the ADC. V is an output voltage? 100 Suppose you are given 8-bit ADC and need to achieve a step size of 5 mV. What should be your The pins CH CHR in ADC0848 are eight (R) analog input channels. Which of the following statements is bne? 20 Which of the following is true aboutthe INTR pin in ADC? 3 While CS 0 and RD I, provide the addres of the selected channel to the DB0...DB7 pins and apply low-to-high pulse to the WR pin to latch the address and start conversion. Is this sunement true or false?

Explanation / Answer

1)In order to send data to the LCD to be displayed, set RS=1 and high to low pulse to E pin.

2)To read the busy flag ofthe LCD, what should be the status of Rs and Rw bits.?

RW should be LOW and for read operation the R/W should be HIGH.Rw=High Rs=Low

3)A stepper motor translates pulses into?

A stepper motor is a widely used device that translates electrical pulses into mechanical movement. In applications such as disk drives, dot matrix printers the stepper motor is used for position control.

4)The stepping action of a stepper motor is controlled by

stepper motors essential to control the acceleration/ deceleration when altering the speed.

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