The device can also act as a thermostat with three dedicated thermal alarm outputs. This application note illustrates temperature control applications applicable to all Dallas sensors with dedicated thermostat outputs. The DS1620 Digital Thermometer and Thermostat provides temperature measurement in 9-bit 2's complement form. This application note describes a technique to increase resolution of the measurement up to 13 bits, including sample code. The Dallas 1-Wire interface reduces the data bus to the absolute minimum, i.e., a single data line and a ground reference.
Diagrams detail various functionality of the device.
With three thermal alarm outputs, the DS1620 can also act as a thermostat. However, the SPI interface found on many Motorola processors cannot directly communicate with the 3-wire interface found on the DS1620. This application note discusses the necessary steps to successfully interface the DS1620 to the Motorola SPI bus, and includes a brief description of the SPI interface and software code to accomplish the interface. In addition to this, the demo requires the DS9097 COM Port Adapter . This application note contains information about the configuration of the DS1820 Minimalist Temperature Kit, software operation, a description of the graphical user interface temperature control tab, a demo board circuit diagram, and more.