Texas Instruments DRV8811, Руководство пользователя, Страница: 4 / 22

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Introduction
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4 SLVA344C – July 2009 – Revised July 2019
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Copyright © 2009–2019, Texas Instruments Incorporated
Laser and Motor Drives
1.4 Jumpers
Three pin jumpers can be configured independently from the other two or three pin jumpers. However, two
pin jumpers must either be closed or open. Two pin jumpers (JP2 to JP5) connect the diodes to the motor
outputs and are used under asynchronous rectification (SR = LO).
1.4.1 VREF SELECT (JP1) Jumper
Figure 1. VREF SELECT Jumper
To configure the VREF SELECT jumper: Figure 1 (a) selects an analog voltage derived from VDD through
a voltage divider implemented as a potentiometer R4. Figure 1 (b) selects an analog voltage derived from
the MSP430’s digital to analog converter channel 0 (DAC0).
1.4.2 DECAY SELECT (JP6) Jumper
Figure 2. DECAY SELECT Jumper
To configure the DECAY SELECT jumper: Figure 2 (a) selects an analog voltage derived from VDD
through a voltage divider implemented as a potentiometer R6. Figure 2 (b) selects an analog voltage
derived from the MSP430’s digital to analog converter channel 1 (DAC1).
1.5 Motor Outputs
There are three ways of connecting the bipolar stepper motor into the DRV8811 EVM: four pin header
(J2), four position terminal block (J3) or test clips. Each connection style offers identical connectivity to the
device’s output terminals. It is recommended, however, to use the header or terminal block, as the test
stakes traces are of low current handling capability.
2 Installing Drivers And Software
2.1 Installing the FTDI USB Driver
Instructions on how to install the FTDI USB driver on a Windows based computer are detailed in the
“USB_Drivers_Install_Readme.pdf” file supplied with the CD inside the USB_Driver folder.
2.2 GUI Software Installation
The following section explains the location of files and the procedure for installing the software correctly.