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Which ports are used in the multi-master system to avoid errors?

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Which ports are used in the multi-master system to avoid errors?

(a) unidirectional port

(b) bidirectional port

(c) multi directional port

(d) tridirectional port

This question was posed to me at a job interview.

My question is taken from I2C-II topic in portion Basic Peripherals of Embedded Systems

1 Answer

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Right option is (b) bidirectional port

Explanation: By using the bidirectional ports, each master can monitor the line and confirm its expected state and if it is not matched, a mismatch or collision had occurred which will discontinue the transmission by the master.

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