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Which of the following byte performs the slave selection?

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Which of the following byte performs the slave selection?

(a) first byte

(b) second byte

(c) terminal byte

(d) eighth byte

I had been asked this question during an online interview.

This key question is from I2C-I topic in division Basic Peripherals of Embedded Systems

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The correct choice is (a) first byte

The best explanation: The slave selection is performed by using the first byte as an address byte. When the address byte is sent out all the slave devices compares the address by its own value. If there is a match, the ACKNOWLEDGE signal will be sent by the slave.

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