1-Wire
What is 1-Wire?
Definition
1-Wire® is a single-wire (plus ground) communications protocol.
The 1-Wire bus is a simple signaling scheme that performs half-duplex bidirectional communications between a host/main controller and one or more nodes sharing a common data line. Both power and data communications are transmitted over this single 1-Wire line.
For power delivery, nodes capture charge on an internal capacitor when the line is in a high state and then use this charge for device operation when the line is low during data transmission. This unique communication scheme allows memory, authentication, and mixed signal functions to be added easily and efficiently at any time.
1-Wire products provide combinations of memory, mixed-signal, and secure authentication functions with complete operation from a single contact serial interface. With both power and communication delivered over the serial protocol, 1-Wire devices are unmatched in their ability to provide key functions to applications where microcontroller input/output resources are constrained, or system interconnect must be minimized. Common product features include single contact for operation and power delivery, unique and unalterable 64-bit serial number in each device, and exceptional ESD performance.
1-Wire devices include battery fuel gauges, protectors, and monitors, battery ID and authentication devices, data loggers, interface products, real-time clocks, secure authenticators, and temperature sensors.