Evaluates: MAX14827 MAX14827 Evaluation Kit MAX14827A General Description Quick Start The MAX14827 evaluation kit (EV kit) consists of a Recommended Equipment MAX14827 evaluation board is a fully assembled and tested MAX14827 EV kit circuit board that evaluates the MAX14827 IO-Link 24V, 500mA DC power supply device transceiver. Function generator or logic signal generator The EV kit is designed to operate as a stand-alone board or with an mbed board for easy software evaluation. Oscilloscope The MAX14827 EV kit can also be used to evaluate the Procedure MAX14827A. The EV kit is fully assembled and tested. Follow the steps below to verify board operation before exercising the full Features features of the device: IO-Link-Compliant Device Transceiver 1) Verify that all the jumpers are in their default positions, IO and SPI Interface Terminals as shown in Table 1. Ensure that SW1 is to the left Proven PCB Layout (using the internal 5V LDO). Fully Assembled and Tested 2) Connect the 24V DC power supply on the VCC and GND connectors of the EV kit board. Ordering Information appears at end of data sheet. 3) Set the function generator to generate a 03V 1kHz square wave. Connect the function generator between the TX and GND test points on the EV kit. 4) Connect the oscilloscope to the C/Q test point. 5) Turn on the power supply. 6) Turn on the function generator. 7) Verify that the C/Q output switches as expected. IO-Link is a registered trademark of ifm electronic GmbH. mbed is a registered trademark of ARM Limited. 19-8251 Rev 1 7/16Evaluates: MAX14827 MAX14827 Evaluation Kit MAX14827A Pin-Mode Detailed Description of Hardware To operate the device in pin-mode, set the mode-selection The MAX14827 EV kit provides a proven layout for the switch, SW2, to the off position (left). In pin-mode, J5, J6, MAX14827 IO-Link device transceiver. and J7 are used to configure the C/Q and DO drivers. All the power-supply and regulator input and output pins are connected to convenient connectors for easy SPI Mode probing. The device logic input and output pins are also The EV kit was designed to operate with an mbed board provided with convenient connectors for logic testing. for fast and easy prototyping. To operate the EV kit in SPI The transceivers C/Q, and DO pins are protected by TVS mode, connect the board to the Arduino-headers on the diodes. mbed board and set the mode-selection switch, SW2, to the on position. Remove the shunts from all of the jumpers See Table 1 for a description of all the EV kit jumper except J4. configurations. Evaluating the MAX14827 in Pin-Mode Regulators Configuring the Drivers (C/Q, DO) The device includes two internal regulators to generate 5V (V5) and 3.3V (V33). Use the switch (SW1) to set the C/Q and DO are both configured by setting the J5, J6, and configuration for the V5 regulator. J7 jumpers in pin-mode. See Table 2. Set switch SW1 to position 1 (far left) to generate 5V Set J5 to 1-2 (SDI/TX/NPN is high) to set the C/Q and DO using the internal regulator. In this configuration, the V5 drivers in NPN mode. Set J6 to 1-2 (CS/PP is high) to set regulator is capable of driving external loads up to 30mA C/Q and DO to push-pull mode. C/Q and DO operate in total external load current. PNP mode when J5 and J6 are both set to 2-3 (SDI/TX/ NPN and CS/PP are low). Set SW1 to position 2 (middle) to configure V5 as an input. When the internal 5V regulator is not used, V5 The C/Q driver is enabled/disabled by setting the TXEN becomes the supply input for the internal analog and input. Set J8 to 1-2 (TXEN is high) to enable the C/Q digital functions and must be supplied externally so that the driver. Apply a signal at the TX input (TP19) to set the device operates normally. Connect an external 5V supply C/Q output. C/Q is an input when J8 is 2-3 (TXEN is low). to the V5 test point when SW1 is in position 2. 5V must be DO cannot be disabled in Pin mode. Apply a signal at the present on V5 for normal operation. LO input (TP15) to set the DO output. To drive larger loads, an external pass transistor can be used Setting the Driver Current (C/Q, DO) to generate the required 5V. For this mode of operation, set Driver current limit for the C/Q and DO outputs is selectable SW1 to position 3 (far right). This switch setting connects in pin-mode using the CLK/TXEN/200MA input. Set J7 to REG to the base of the transistor to regulate the voltage and 2-3 to set the driver current limit to 100mA (typ). Set J7 to connects V5 to the emitter. 1-2 to set the driver current limit to 200mA (typ). Use jumper J4 to set the logic supply voltage. Connect J4 to 1-2 to set VL = V5 (5V). Connect J4 to 2-3 to set VL = V33 (3.3V). LED Driver (LED1IN) Close J1 to pull the LED1IN input high and turn on LED1. Mode Selection (Pin-Mode or SPI Mode) LED1IN is low and LED1 is off when J1 is open. The MAX14827 operates with either pin-mode control or via an SPI interface. Evaluating the MAX14827 in SPI Mode The EV kit was designed to operate with an mbed board for The mode-selection switch (SW2) sets the mode of fast and easy prototyping. To operate the EV kit in SPI mode operation. Set SW2 to the on position to operate the connect the MAX14827 EV kit to the Aurdino-headers on the MAX14827 in SPI mode. Set SW2 to off (left) to operate mbed board and configure the board for SPI operation. See the board in pin-mode. the Evaluating the MAX14827 with mbed Quick Start Guide SW2 can be toggled after power-up. for more details. Maxim Integrated 2 www.maximintegrated.com