![]() The manufacturers’ Maxim has launched its own adapter and drivers to perform read and write data functions. It needs proper hardware and software to connect it to the computer system. We need a proper probe or connector to interface it with a microcontroller or computer. Interfacing with ComputerĭS1990A does not provide a 64-bit unique identifier. ![]() In this section, we will discuss how to use iButton with computer or microcontroller to read 64-bit identification number. The block diagram to show the internal circuitry of the DS1990A iButton for the clarity of its working is provided below: It comes with adhesive backing or a flange to affix it to objects.It supports a multi-drop bus for connectivity of various 1-wire devices.For uniqueness and proper traceability of a particular peripheral, it is embedded with a 64-bit authentication number.The data can only be accessed if it is fastened to the device.Data rate of the serial communication is 16.3 kbps. ![]() Serial Input/Output pin – Data transmits and receive through this pin The pin configuration in tabular are detailed as below: Pin Name The pinout of this unique DS1990A iButton is as shown: Probe for microcontroller/circuit connection Adapter to connect iButton through a USB port
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