Evaluates: MAX14828 MAX14828 Evaluation Kit 2) Install the EV kit software by clicking on the file. General Description The GUI files are created in the Windows Start The MAX14828 evaluation kit (EV kit) consists of a Programs Maxim Integrated menu. During soft- MAX14828 evaluation board is a fully assembled and tested ware installation, some versions of Windows may circuit board that evaluates the MAX14828 IO-Link show a warning message indicating that this soft- device transceiver. ware is from an unknown publisher. This is not an error condition and it is safe to proceed with installation. Features 3) Verify that all the jumpers are in their default positions, IO-Link-Compliant Device Transceiver as shown in Table 1. IO and SPI Interface Terminals 2) Ensure that SW1 is set to position 1 (to the far left). Proven PCB Layout 3) Ensure that all switches on SW2 and SW3 are on (to Fully Assembled and Tested the right). 4) Connect the 24V DC power supply on the VCC and Quick Start GND connectors of the EV kit board. Recommended Equipment 5) Connect the oscilloscope to the C/Q test point (TP8). MAX14828 EV kit 6) Connect the multimeter to the VL testpoint (TP3) USB A-to-micro B cable 7) Turn on the power supply. User supplied Windows 7/Windows 10 PC with spare 8) Verify that the voltage on the multimeter is 3.3V. USB port 9) Connect the USB cable from the PC to the EV 24V, 500mA DC power supply kit board. Multimeter 10) Start the EV kit software by opening the MAX14828 Function generator EV Kit software icon on the desktop or in the Start Oscilloscope Programs Maxim Integrated menu. The EV kit Note: In the following sections, software-related items are software splash screen appears and then the main identified by bolding. Text in bold refers to items directly from window appears, as shown in Figure 1. the EV kit software. Text in bold and underlined refers to 11) Verify that Connected is displayed on the status bar at items from the Windows operating system. the bottom of the main window (Figure 1). Procedure 12)Set the function generator to generate a 0 to 3.3V The EV kit is fully assembled and tested. Follow the steps square wave at 10kHz. below to verify board operation before exercising the full 13)Connect the oscilloscope to the TX (TP19) and CQ features of the device: (TP8) test points. 1) Visit www.maximintegrated.com/evkitsoftware to download the latest version of the EV kit software, 13)Disable the TX switch on SW3 by setting it to the right. Connect the function generator to the TX test point 14827 8EVKITSetupVxxx.EXE. Save the EV kit software to the PC. (TP19). 14)Enable the function generator. 15)Check the Auto-write to MAX14828 box on the GUI. Ordering Information appears at end of data sheet. 16)Enable the CQ driver by setting the CQDis bit B 0 in the CQConfig register to 0. See Figure 2. IO-Link is a registered trademark of ifm electronic GmbH. 17) Verify that the CQ output switches with the TX input. mbed is a registered trademark of ARM Limited. 319-100074 Rev 0 9/17Evaluates: MAX14828 MAX14828 Evaluation Kit Pin-Mode (Standalone Operation) Detailed Description of Hardware To operate the MAX14828 EV kit in stand-alone pin-mode, The MAX14828 EV kit provides a proven layout for the leave the J1 jumper open. In this configuration, the J5, J6, MAX14828 IO-Link device transceiver. and J7 jumpers are used to configure C/Q (Table 2). All the power-supply and regulator input and output Pin-Mode (With the GUI) pins are connected to convenient connectors for easy probing. The device logic input and output pins are also To use the GUI to operate the MAX14828 EV kit in pin- provided with convenient connectors for logic testing. mode, leave the J1 jumper open and set the SPI/PIN button on the GUI to the left. All of the registers in the The C/Q pin are protected by TVS diodes. Register Table will be greyed out in this mode. Click on See Table 1 for a description of all the EV kit jumper the associated button for each of the CS/PP, SDI/TX/ configurations. NPN, and CLK/TXEN inputs to configure C/Q (Table 2). Regulators SPI-Mode The MAX14828 includes two regulators V5 for 5V and To operate the MAX14828 EV kit in SPI-mode, close the V33 for 3.3V. Use the on-board switch (SW1) to set the J1 jumper and ensure that all SW2 and SW3 switches are configuration for the V5 regulator: setting the switch to ON. Set the SPI/PIN button on the GUI to the right. Use position 1 connects the REG pin to V5 and the internal 5V the registers to configure the MAX14828. regulator is enabled. In this configuration, the V5 regulator is Evaluating the MAX14828 in Pin-Mode capable of driving external loads up to 30mA total external load current. Configuring the C/Q Driver Set SW1 to position 2 to configure V5 as an input. When In standalone pin mode, C/Q is configured by setting the the internal 5V regulator is not used, V5 becomes the J5, J6, and J7 (see Table 2). supply input for the internal analog and digital functions Set J5 to 1-2 (SDI/TX/NPN is high) to set the C/Q driver and must be supplied externally so that the device operates in NPN mode. Set J6 to 1-2 (CS/PP is high) to set C/Q in normally. Connect an external 5V supply to the V5 test push-pull mode. C/Q operates in PNP mode when J5 and point when SW1 is in position 2. 5V must be present on V5 J6 are both set to 2-3 (SDI/TX/NPN and CS/PP are low). for normal operation. The C/Q driver is enabled/disabled by setting the TXEN To drive larger loads, an external pass transistor can be used input. Set J3 to 1-2 (TXEN is high) to enable the C/Q to generate the required 5V. For this mode of operation, set driver. Apply a signal at the TX input (TP19) to set the SW1 to position 3. This switch setting connects REG to the C/Q output. C/Q is an input when J3 is 2-3 (TXEN is low). base of the transistor to regulate the voltage and connects V5 The GUI can also be used to configure C/Q in pin-mode. to the emitter. Click on the SPI/PIN button on the GUI so that Pin-mode Use jumper J4 to set the logic supply voltage. Connect J4 to 1-2 is selected (register table is greyed out). Set the switches to set VL = V5 (5V). Connect J4 to 2-3 to set VL = V33 (3.3V). next to the CSB/PP and SDI/TX/NPN lines to configure C/Q. C/Q is PP when CSB/PP is set to the right. C/Q is Mode Selection (Pin-Mode or SPI Mode) NPN when SDI/TX/NPN is set to the right (and CSB/PP is The MAX14828 operates with either pin-mode control or set to the left). C/Q is PNP when both CSB/PP and SDI/ through an SPI interface. The GUI can be used to evaluate TX/NPN are set to the left. the device in either mode. Setting the C/Q Driver Current Use the mode-selection jumper, J1, or set the SPI/PIN switch on the GUI to set the mode of operation. In stand-alone pin mode, the C/Q driver current limit is set with the CLK/TXEN/200MA input. Set J7 to 2-3 to set the driver current limit to 100mA (typ). Set J7 to 1-2 to set the driver current limit to 200mA (typ). Maxim Integrated 2 www.maximintegrated.com