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Which interface does SD.h depend on for communication between the SD Card Module and the Arduino?

Which interface does SD.h depend on for communication between the SD Card Module and the Arduino? Correct Answer SPI

The SD.h library for communication between SD Card Modules and Arduinos use SPI (Serial Peripheral Interface) for establishing communications. The SPI is a synchronous Serial Communication Protocol which is used for short distance communications between microcontrollers and devices like SD Card Readers, shift resistors, etc.

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