Chapter 11. 1-Wire - W1
After looking at the most frequently used buses that a developer can find on an embedded computer (USB, I2C, and SPI), it's time to present a less famous, but not less important communication bus: the 1-Wire bus (pronounced as one-wire and usually abbreviated with W1 or OW).
Even if this bus is quite slow compared to other buses, it's interesting because it permits to communicate with a remote device using only one wire! This allows to simplify connections between the CPU and its peripherals, giving the designer the possibility to have the most economical and simply way to add electronic devices for identification, authentication, and delivery of calibration data or manufacturing information to a computer board.
