Which pin provides the reference clock for the transfer of data?(a) SDA(b) SCL(c) SPDR(d) Interrupt pinI had been asked this question in an internship interview.My question is based upon I2C-I topic in chapter Basic Peripherals of Embedded Systems

Which pin provides the reference clock for the transfer of data?(a) SD

1.	Which pin provides the reference clock for the transfer of data?(a) SDA(b) SCL(c) SPDR(d) Interrupt pinI had been asked this question in an internship interview.My question is based upon I2C-I topic in chapter Basic Peripherals of Embedded Systems
Answer» Correct option is (b) SCL To elaborate: The SCL pin can PROVIDE the reference clock for the TRANSMISSION of DATA but it is not a free running clock.

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