Click here for production status of specific part numbers. Evaluates: MAX22520 MAX22520 Evaluation Kit General Description Quick Start The MAX22520 evaluation kit (EV kit) is a fully assembled Recommended Equipment and tested circuit board that evaluates the MAX22520 MAX22520 EV kit (USB-A-to-micro-B cable included) OTP programmable digital output (DO). User-supplied Windows 10 PC with a spare USB port The EV kit includes Windows -compatible software that 24V, 1A DC power supply provides a graphical user interface (GUI) for exercising the test and programming features of the MAX22520. The Two multimeters/voltmeters EV kit is connected to a PC through a USB-A-to-micro-B Note: In the following sections, software-related items are cable. identified by bolding. Text in bold refers to items directly from the EV kit software. Text in bold and underlined Features refers to items from the Windows operating system. OTP Progammable Digital Output (DO) Procedure 1-Wire Interface Terminals The EV kit is fully assembled and tested. Follow the steps Windows 10-Compatible Software below to verify board operation before exercising the full USB-PC Connection features of the device: Proven PCB Layout 1) Visit www.maximintegrated.com/evkitsoftware to download the latest version of the EV kit software, Fully Assembled and Tested MAX22520EVKITSetupVx.xx.ZIP. Save the EV kit soft- ware to a temporary folder and uncompress the ZIP file. 2) Install the EV kit software and USB driver on your computer by running the MAX22520EVKITSetupVx. xx.EXE program inside the temporary folder. The program files are copied to your PC and icons are Ordering Information appears at end of data sheet. created in the Windows Start Programs Maxim Integrated menu. During software installation, some versions of Windows can show a warning message indicating that this software is from an unknown publisher. This is not an error condition and it is safe to proceed with installation. Administrator privi- leges are required to install the USB device driver on Windows. Windows is registered trademark of Microsoft Corporation. 319-100456 Rev 0 10/19Evaluates: MAX22520 MAX22520 Evaluation Kit 3) Verify that all the jumpers are in their default posi- banks (C1 and C2). Press the Read Registers button to tions, as shown in Table 1. read all registers in both banks. 4) Connect one multimeter to the VCC testpoint (TP1). The Registers tab includes a tabular listing of available reigsters and bits (Figure 2). Click on a register name in 5) Connect the other multimeter to the VLDO testpoint the left register table to access the individual bits in that (TP2). register. When the register name is selected in the register 6) Connect the USB cable from the PC to the EV kit board. table, the right register table shows the individual bits for A Windows message appears when connecting the EV that register. Click on the drop-down menu next to each bit kit. in the lower table to select the bit setting. When all of the 7) Start the EV kit software by opening its icon in the bits are set as desired, click on the Write Registers but- Windows Start Programs Maxim Integrated ton to write the selected bit settings to the OTP registers. menu. Burn Mode 8) Click on the Device menu and select Connect to Select Burn Mode in the Mode Select box after the connect to the board. Verify that Status: MAX22520 MAX22520 has entered test mode and the desired reg- EV Kit Connected is displayed on the status bar at ister values have been written to the device. Click on the the bottom right of the main window (Figure 1). Note Verify Burn Ready button to verify that the C1 and C2 that the voltage on the VCC test point is 0V (typ) banks are ready for OTP burn. Once the GUI has verified when the board is connected. that the MAX22520 is ready to program, click on the OTP 9) Select the Test Mode radio button and click on the Bank 1 Burn or OTP Bank 2 Burn button to program the Enter Test Mode button to set the device into test desired OTP registers. mode. On-board LEDs turn off and on as the device Note that Bank C1 and Bank C2 must be programmed enters test mode. The VCC test point is 14.8V separately. After a bank is programmed, the VCC voltage (typ) when the device is in test mode and ready for on the MAX22520 EV kit drops to 0V and the part must be evaluation. Verify that OTP Ready for Test Mode accessed in test mode again. Repeat the burn process for Evaluation is displayed in the bottom right of the the unprogrammed bank. main window. 10) Default register values are unknown in test mode Detailed Description of Hardware when OTP is not programmed. Select the 3.3V The MAX22520 EV kit includes the MAX22520 OTP radio button in the VLDO box and click on the Write programmable digital output (DO) and the external com- Registers button. Verify that the voltage on the ponents for writing to and evaluating the device. All logic- VLDO test point is 3.3V (typ). level I/Os and the digital output are available on yellow 11) Select the 5V radio button in the VLDO box and click test points. on the Write Registers button. Verify that the volt- 1-Wire Interface age on the VLDO test point changes to 5V (typ). The MAX22520 is 1-Wire OTP programmable using the V , DO, and GND pins. The MAX22520 EV kit uses the Detailed Description of Software CC 2 FT2232 USB-to-I C transceiver to communicate with the Configuring the Registers in Test Mode PC and the DS2484 1-Wire master to communicate with Once the EV kit is connected, select Test Mode to access the MAX22520. the MAX22520 in OTP test mode. The EV kit software Close the J2 and J3 jumpers on the MAX22520 EV kit for provides two ways to access the OTP registers when the 1-Wire communication with the MAX22520. Remove the device is in test mode: the OTP tab and the Registers tab. shunts on J2 and J3 to evaluate the part after the part has In the OTP tab (Figure 1), use the drop-down menus, been programmed and the Exit Test Mode button on the counters, and radio buttons to enable/disable functionality GUI has been pressed, or after OTP programming. and set desired thresholds. Press the Write Registers button to write values to all of the registers in both OTP 1-Wire is a registered trademark of Maxim Integrated Products, Inc.. Maxim Integrated 2 www.maximintegrated.com