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What is the function of the WR pin?

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+1 vote
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in Microcontroller by (14.6k points)
What is the function of the WR pin?

(a) its active high input used to inform ADC0804 to the end of conversion

(b) its active low input used to inform ADC0804 to the end of conversion

(c) its active low input used to inform ADC0804 to the start of conversion

(d) its active high input used to inform ADC0804 to the start of conversion

I had been asked this question in an internship interview.

My question is based upon ADC, DAC Interfacing topic in chapter 8051 Microcontroller of Microcontroller

1 Answer

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by (24.2k points)
Correct option is (c) its active low input used to inform ADC0804 to the start of conversion

The explanation is: WR is active low input used to inform the ADC0804 to start the conversion process.

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