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MSP
DRV
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USB
VBAT
Hardware Configuration
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4 Hardware Configuration
The DRV2605EVM-CT is flexible and can be used to completely evaluate the DRV2605. The following
sections list the various hardware configurations.
4.1 Input and Output Overview
The DRV2605EVM-CT allows complete evaluation of the DRV2605 though test points, jacks, and
connectors. Table 5 gives a brief description of the hardware.
Table 5. Hardware Overview
Signal Description I/O
PWM External input to DRV2605 IN/TRIG pin Input / Observe
EN External DRV2605 enable control Input / Observe
Filtered output test points for observation, connect to oscilloscope, or
OUT+ / OUT– Output
measurement equipment
OUT Unfiltered output terminal block, connect to actuator Output
USB USB power (5 V) Input
VBAT External supply power (2.5 to 5.5 V) Input
SBW MSP430 programming header Input / Output
I
2
C DRV2605 and MSP430 I
2
C bus Input / Output
The audio jack is connected to the IN/TRIG pin of the DRV2605. When the
Audio DRV2605 is in audio-to-haptics mode, audio from this jack is converted to Input
haptics
Hardware configuration details can be found in the following sections.
4.2 Power Supply Selection
The DRV2605EVM-CT can be powered by USB or an external power supply (VBAT). Jumpers “DRV” and
“MSP” are used to select USB or VBAT for the DRV2605 and MSP430G2553, respectively. See the
following table for possible configurations.
Figure 16. Power Jumper Selection
Supply Configuration DRV MSP DRV2605 Supply Voltage
(1)
USB – both USB USB 5 V
DRV2605 external supply, MSP430
VBAT USB VBAT
USB
External Supply – both VBAT VBAT VBAT
USB with 3.3-V LDO
(2)
– Both USB USB 3.3 V (R4 = Short, R5 = Open)
(1)
The DRV2605 supply must be on before operating the MSP430.
(2)
If a 3.3-V DRV2605 supply voltage is preferred while using the USB as the power source, remove R5 and add a 0-Ω resistor
across R4.
16
DRV2605EVM-CT ERM and LRA Haptic Driver Evaluation Kit SLOU348B–January 2013–Revised March 2014
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