MICROPROCESSOR AND MICROCONTROLLER

INTRODUCTION TO MICROPEOCESSOR

MODEL OF MICROPROCESSOR

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

While programming the ADC0808/0809 IC what steps are followed?

A	select the analog channel, start the conversion, monitor the conversion, display the digital results
B	select the analog channel, activate the ALE signal (L to H pulse), start the conversion, monitor the conversion, read the digital results
C	select the analog channel, activate the ALE signal (H to L pulse), start the conversion, monitor the conversion, read the digital results
D	select the channel, start the conversion, end the conversion

Explanation:

Detailed explanation-1: -Explanation: While programming the ADC0808/0809 IC firstly we need to select the channel from the A, B, C pins. Then we need to activate the ALE signal, this is needed to latch the address. Then we start the conversion from the WR pin. After monitoring the INTR pin we get to know about the end of the conversion.

Detailed explanation-2: -5. What steps have to be followed for interfacing a sensor to a microcontroller 8051? Explanation: For interfacing a sensor with an 8051 microcontroller, we need ADC in between because output of sensor is analog and microcontroller works on digital signals only.

Detailed explanation-3: -WR pin’s active low input tells ADC0804 about the start of conversion.

There is 1 question to complete.