100k
470pF
100k
470pF
OUT
OUT-
OUT+
From DRV2604L
U
S
B
V
B
A
T
MSP
DRV
USB
VBAT
USB
VBAT
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Hardware Configuration
4.2
Power Supply Selection
The DRV2604LEVM-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 DRV2604L and MSP430G2553, respectively. See the
following table for possible configurations.
Figure 18. Power Jumper Selection
Supply Configuration
DRV
MSP
DRV2604L Supply Voltage
(1)
USB – Both
USB
USB
5 V
DRV2604L external supply,
VBAT
USB
VBAT
MSP430 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 DRV2604L supply must be on before operating the MSP430.
(2)
If a 3.3-V DRV2604L supply voltage is preferred while using the USB as the power source, remove R5 and add a 0-
Ω
resistor
across R4.
4.3
Using an External Actuator
Figure 19. Terminal Block and Test Points
The DRV2604LEVM-CT can be used with an external actuator. Follow the instructions below to attach an
actuator to the
OUT
terminal block.
1. Remove jumpers JP3 and JP4, which disconnects the on-board actuators from the DRV2604L.
2. Attach the positive and negative leads of the actuator to the green
OUT
terminal block keeping in mind
polarity.
3. Screw down the terminal block to secure the actuator leads.
It is important to use the green terminal block when connecting an external actuator. The
OUT+
and
OUT–
test points have low-pass filters and should only be used for oscilloscope and bench measurements.
15
SLOU390A – May 2014 – Revised June 2014
DRV2604L ERM, LRA Haptic Driver Evaluation Kit
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