Question

Why do we make the connection of the SCLK for communicating serially between two devices?

(a) to get a clock output from the device

(b) to synchronize the two devices

(c) to obtain an analog output

(d) all of the mentioned

This question was addressed to me in examination.

This key question is from SPI Protocol in section AVR Microcontroller of Microcontroller

Answer 1

Correct choice is (b) to synchronize the two devices

To explain: We need an SCLK in order for the two devices to communicate with each other properly. It acts as a pulse according to which one device sends a message and the other receives it.