Evaluates: MAX14890E MAX14890E Evalution Kit General Description Quick Start The MAX14890E evaluation kit (EV kit) is a fully assembled Recommended Equipment and tested PCB that contains the MAX14890E incremental MAX14890E EV kit encoder interface. The MAX14890E incremental encoder 5V , 500mA power supply receiver contains four differential receivers and two single- ended receivers for RS-422, HTL, TTL, and digital signals. Function generator or logic signal generator Power for the transceiver can be provided from a single Oscilloscope +5V source or from an on-board 24V to 5V step-down Procedure circuit. The MAX14890E EV kit includes terminal blocks The EV kit is fully assembled and tested. Follow the steps for motor and power connections. below to verify board operation before exercising the full On-board switches and jumpers are included to configure features of the device: the MAX14890E in pin-control mode. The evaluation 1) Verify that all the jumpers are in their default positions, board is also designed with the Arduino form-factor for easy software evaluation and development. as shown in Table 1. 2) Set the DC power supply to +5V and connect between Features the VCC and GND test points on the EV kit. Four Configurable Differential or Single-Ended 3) Connect the function generator to the Z input on the T3 Receivers block terminator. Connect the Z input to ground. Set the SPI or Pin-Controlled Operation USB-PC Connection function generator to generate a 2V 100kHz signal. Proven PCB Layout 4) Connect the oscilloscope to the ZO output. Fully Assembled and Tested 5) Turn on the power supply. 6) Turn on the function generator. Ordering Information appears at end of data sheet. 7) Verify that ZO is switching as expected. 8) Repeat with the A, A, B, B, DIY, and Y inputs. Arduino is a registered trademark of Arduino, LLC. 19-7566 Rev 0 3/15Evaluates: MAX14890E MAX14890E Evalution Kit Powering the Board Detailed Description The MAX14890E operates from a single +5V supply. A The MAX14890E EV kit is a fully tested circuit board separate logic-supply (V ) is also available. Apply +5V demonstrating the capabilities of the MAX14890E L to VCC (TP1) to power the board using a single supply. incremental encoder interface. Shunt the J1 jumper to connect V to VCC, or apply a L The EV kit includes an on-board 24V-to-5V step-down separate voltage as low as 1.62V to V (TP2) for a separate L supply, fault indicator LEDs, jumpers for pin-mode control, logic-supply. and SPI-connections. The board is designed to operate The EV kit also includes a 24V step-down circuit. To either as a stand-alone board or with an external mbed power the board from an external +24V source, ensure or Arduino board (Figure 2). that the J1 jumper is open and connect the +24V supply and GND lead to the T6 terminal block. Put a shunt across the J2 jumper to power VCC with the +5V generated from the step-down circuit. Table 1. Jumper Descriptions JUMPER SHUNT POSITON DESCRIPTION Open VL is not connected to VCC J1 Closed* VL is connected to VCC Open* Output of 24V step-down circuit is not connected to VCC J2 Closed Output of 24V step-down circuit is connected to VCC Open 220 termination is connected between A and A J4 Closed* 220 termination is not connected between A and A Open 220 termination is connected between B and B J5 Closed* 220 termination is not connected between B and B Open 220 termination is connected between Z and Z J6 Closed* 220 termination is not connected between Z and Z Open 220 termination is connected between DI/Y and Y J7 Closed* 220 termination is not connected between DI/Y and Y 1-2 DI/TTLY is high. See Table 2. J8 2-3* DI/TTLY is low. See Table 2. 1-2 DI/TTL2 is high. RxD2 is in TTL mode. J9 2-3* DI/TTL2 is low. RxD2 is in DI mode. 1-2 DI/TTL3 is high. RxD3 is in TTL mode. J10 2-3* DI/TTL3 is low. RxD3 is in DI mode. 1-2 HITH/CSB is high. J11 2-3* HITH/CSB is low 1-2 SNGL/CLK is high. See Table 2. J12 2-3* SNGL/CLK is low. See Table 2. 1-2* TTL/SDI is high. See Table 2. J13 2-3 TTL/SDI is low. See Table 2. *Default position. mbed is a registered trademark of ARM Limited LLC. Maxim Integrated 2 www.maximintegrated.com