Machine-translated by Google. Questions are authored in English.
Top

Discussion

A design must connect twelve nodes over 40 m in an electrically noisy factory. The bus to choose is

  • A.CAN or RS-485, both being differential and multi-drop
  • B.I2C, which supports a number of devices on only two wires
  • C.SPI, which offers the highest data rate
  • D.USB, which supplies power as well as data

Answer: A

Differential signalling over a terminated twisted pair is what survives that distance and that noise, and both candidates are designed for multi-drop wiring. I2C and SPI are board-level buses and USB is a short-range host-centred bus.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.