The UART 1-Wire click is designed to convert standard UART or 3.3V RS232 signals into 1-Wire® signals. Its main features include:
- It manages all the complex, time-sensitive signal waveforms involved in 1-Wire® communication
- The slew rate control for larger 1-Wire® busses,
- Selectable data rate
- An accurate self-calibrating time base
- ESD protection and more
The Click board™ enables rapid development of UART to 1-Wire® applications. It can automatically convert a single character from the UART bus into eight 1-Wire® time slots, thereby increasing the data turnout significantly, while reducing the workload from the host microcontroller.
The UART 1-Wire click features a set of options for fine-tuning the 1-Wire® bus performance, allowing it to accommodate a wide variety of different applications. The Click board™ uses the accurate, crystal-driven UART timing as a reference for the 1-Wire® time base.
The UART 1-Wire click represents a perfect solution for rapid development of 1-Wire® applications. It can be used to facilitate working with various iButton® devices or similar applications based on 1-Wire® communication, offering a simple and familiar UART interface to the host microcontroller (MCU).
About the 1-Wire protocol
1-Wire® is a very popular communication protocol by Maxim Integrated that requires only two wires: signal line and GND. In most cases the GND is common to both devices, so the whole bus is reduced to a single line. The 1-Wire® communication protocol is often used between different devices when low-speed communication is sufficient. With the appearance of iButton® devices and MicroLAN interfaces, the 1-Wire® protocol becomes popular. However, there are not many MCUs that have the 1-Wire® peripheral and must rely on bit-banging routines to provide an accurate 1-Wire® signal waveform. Producing accurately timed signals by using such routines may prove demanding for most applications. Because of this, devices such as UART 1-Wire click simplify the firmware development greatly, reducing the workload from the host MCU.
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