1-Wire protokol reducerer kompleksiteten i langtrækkende netværk med I²C og SPI sensorer
Maxim benytter 1-Wire protokol til at reducere kompleksitet og kostpris i forbindelse med opbygning af netværk med remotely opkoblede I²C og SPI sensorer (in english).
Designers expanding connections to remote sensor networks can now reduce complexity and cost to the industry's lowest levels with the DS28E18 1-Wire-to-I 2C/SPI Bridge from Maxim Integrated Products. By leveraging Maxim Integrated's 1-Wire protocol to interface with I 2C and SPI-compatible sensors, the DS28E18 reduces complexity by connecting devices using only two wires compared to competitive solutions that require four wires for I 2C or six for SPI.Nowadays, most designers use serial interfaces to connect remote sensors in industrial and remote monitoring applications. However, the most popular protocols are costly and complex because they require up to five external switch extenders to reach devices at distances as long as 100 meters. In addition, some of the interfaces widely deployed today require 6 cables for connecting multiple extended sensors to a host microcontroller.
The DS28E18 enables both power and communications on a single wire, using Maxim Integrated's 1-Wire protocol to link with I2C or SPI peripheral devices over 100 meters with only two wires. The solution eliminates up to five extender and switch ICs, significantly reducing connection costs and software complexity. In addition, only one programmable I/O port from the host microcontroller is necessary to operate a network with 10 to 20 nodes.
- As sensors become more prevalent in a number of applications, so does the need to extend connectivity over longer distances, says Scott Jones, managing director, Embedded Security at Maxim Integrated.
- To cost effectively extend the operating distance for serial interface devices invokes a great deal of complexity but using 1-Wire protocol greatly simplifies these networks with simpler software and fewer cables and ICs.
