www.ti.com | Installing Drivers And Software |
1.3Test Stakes
Every pin on the device has been brought out to a test stake. A label on the silkscreen identifies each signal.
1.4Jumpers
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).
1.4.1VREF SELECT (JP1) Jumper
| POT | INT |
| POT | INT |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(a) | (b) |
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).
1.4.2DECAY SELECT (JP6) Jumper
| POT | INT |
| POT | INT |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(a) | (b) |
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).
1.5Motor 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
2.1Installing 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.
Laser and Motor Drives | 7 |
Submit Documentation Feedback
