Click here for production status of specific part numbers. DS18B20 Evaluation System Evaluates: DS18B20 General Description Quick Start The DS18B20 evaluation system (EV system) demon- Required Equipment strates the DS18B20 1-wire thermometer. The DS18B20 DS18B20 EV System (includes USB cable) EV system consists of the DS18B20 evaluation kit (EV Windows PC kit) and the USB2PMB2 adapter board. Windows XP and Windows 7/8/8.1/10 compatible software provides Note: In the following sections, software-related items are identified by bolding.Text in bold refers to items directly from a user-friendly interface that demonstrates the features the EV system software. Text in bold and underlined refers to of the DS18B20. items from the Windows operating system. The DS18B20 EV system comes with the 8-pin SOP DS18B20U+ installed. Features Ordering Information appears at end of data sheet. 6-Pin Pmod-Compatible Connector Proven PCB Layout Fully Assembled and Tested Windows XP, Windows 7/8/8.1/10-Compatible Software DS18B20 EV System Photo Windows and Windows XP are registered trademarks and registered service marks of Microsoft Corporation. Pmod is a trademark of Digilent Inc. 319-100315 Rev 0 2/19DS18B20 Evaluation System Evaluates: DS18B20 Procedure Configuration The EV system is fully assembled and tested. Follow the The configuration dropdown list allows the user to select steps below to verify board operation: the conversion resolution. Use the Resolution drop down list to select between 9-, 10-, 11-, and 12-bits resolution. 1. Install the DS18B20GUISetup.msi software on your With each resolution, the user can set the desired sampling computer. rate using the options in the Conversion Time dropdown 2. Align the X2 connector (top row) of the USB2PMB2 list. with the J1 connector of the DS18B20 EV system. Address 3. Verify that the shunts are in the default position as 2 The DS2482s I C slave address is determined by the shown in Table 1. logic states of the AD pins. The GUI allows controlling 4. Connect the USB cable from the PC to the USB2PMB2 the states of the A pins by selecting the appropriate board. checkboxes and setting the appropriate bits in the control 5. Open the EV system GUI, DS18B20EVKit.exe (Figure 2 byte of the I C command. Make sure the shunts are 1). installed in the 1-3 position of jumpers J5 and J6. All other shunt options on jumpers J5 and J6 would set the logic 6. Click the Scan Adapters button. Then select the levels to low or high. option PMODxxxxxx (where xxxxxx is numeric) and click the Connect button. ROM 7. Select the desired SCL clock frequency and click the Within the ROM Commands groupbox, the controls Set SCL button. include Search ROM, read ROM, match ROM, skip ROM, 8. Select an address from the Set Address dropdown and alarm search. list and click the button to the right. Commands 9. Click the Search button and verify appropriate address Within the Command groupbox, the controls include was found. temperature readings, write scratchpad, read scratchpad, 10. Start evaluating the DS18B20 by clicking on the 2 copy scratchpad, recall E , and read power supply. Sample Continuously button. The Read Scratchpad button will update the TH (Temperature High), TL (Temperature Low), and General Description of Software Configuration fields. The Copy Scratchpad button The main window of the DS18B20 EV system software will transfer the current data on the scratchpad to the contains controls to evaluate the DS18B20 IC. EEPROM. The Recall E2 button recalls the data stored on the EEPROM. Click Read Scratchpad to retrieve EEPROM data and the appropriate fields will update. Table 1. Jumper Descriptions JUMPER SHUNT POSITION DESCRIPTION Not installed Disconnects J1-4 from SCL of the DS2482. External 1-wire option only. J2 2 Installed* Connects J1-4 to SCL of the DS2482. External I C option only. 2 1-2* Connects J1-3 to SDA pin of the DS2482. External I C option only. J3 1-3 Connects J1-3 to DQ pin of the DS18B20. External 1-wire option only. Not installed* Disconnects IO pin of the DS2482 from DQ pin of the DS18B20. External 1-wire option only. J4 2 Installed Connects IO pin of the DS2482 to DQ pin of the DS18B20. External I C option only. 1-2 Connects AD0 address pin of the DS2482 to V . DD J5 1-3* Controls AD0 address pin of the DS2482 through GUI. 1-4 Connects AD0 address pin of the DS2482 to GND. 1-2 Connects AD1 address pin of the DS2482 to V . DD J6 1-3* Controls AD1 address pin of the DS2482 through GUI. 1-4 Connects AD1 address pin of the DS2482 to GND. *Default Position Maxim Integrated 2 www.maximintegrated.com