The 1-Wire® communication protocol can be generated through an IO pin on a microprocessor, but in order to create a reliable 1-Wire network, correct timing and appropriate output voltage slew rate must be provided. Incorrect timing sent by the 1-Wire master can cause intermittent or complete failure of communication with the 1-Wire slave device. If the output voltage slew rate is not controlled, it may severely limit the length of the network and cause intermittent on and off phenomena. If a serial communication UART is available, then a serial port to 1-Wire bridge (DS2480B) can solve the above problems. The DS2480B is a bridge that converts from a serial interface to the 1-Wire network protocol. As long as the host has a normal serial communication UART, it can generate a 1-Wire waveform with strict timing and voltage slew rate control through this bridge. The DS2480B receives the instructions and data to be sent, performs the 1-Wire operation, and returns the results to the host. Figure 1 shows a simplified block diagram of the DS2480B configuration. Implementing the protocol and navigating through all of the DS2480B commands can be time consuming and confusing. Therefore, this tutorial will introduce common 1-Wire operations and explain the structure of the DS2480B\'s input serial packet and the meaning of the output serial packet.
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