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Comparing SPI with I2C for a single fast memory device, SPI is preferred because

  • A.it needs fewer wires than I2C does for a single device
  • B.it supports addressing
  • C.it detects errors in every transfer
  • D.it reaches tens of megabits with a simpler interface

Answer: D

Push-pull outputs and a dedicated clock let SPI run an order of magnitude faster than I2C's open-drain bus. It uses more wires for one device, has no addressing and no error detection at all, which are the prices paid.

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