JP1
VDD
DRV2605
EN
IN/TRIG
GND
OUT+
OUT-
MSP430
PWM/
GPIO
P3.1
R8
EN
PWM
SDA
SCL
SDA
SCL
C11
AUDIO
R40, 0
Q
R41, NP
SDA SCL
R43, 0
Q
Hardware Configuration
4.5.2
External Source Trigger Control
1. Remove jumper JP1.
2. Enter
3. Select mode 0 (00000’b) using the increment mode button (“+”).
•
B1 - Select the on-board ERM
•
B2 - Select the on-board LRA
•
B3 - Trigger Select (1 = Internal trigger, 2 = External edge, and 3 = External level)
•
B4 - Trigger the waveform sequence using the MSP430
4. Fill the waveform sequencer with waveforms using the external I
2
C port.
5. Choose either the on-board ERM or LRA using buttons B1 or B2.
6. Select either external edge (2) or external level (3) trigger using button B3. The trigger type appears in
binary on the mode LEDs.
7. Apply the external logic signal to the PWM test point to trigger the waveform.
4.6
External I
2
C Input
Figure 20. External I
2
C Input
The DRV2605 can be controlled by an external I
2
C source. Attach the external controller to the I
2
C header
at the top of the board; be sure to connect SDA, SCL, and GND from the external source.
I
2
C communication is possible only when the EN pin is set high. To enable the DRV2605 and allow
external I
2
C control, follow these instructions:
1. Enter
2. Select mode 0 (00000’b) using the increment mode button (“+”).
•
B1 - Select the on-board ERM
•
B2 - Select the on-board LRA
•
B3 - Trigger Select (1 = Internal trigger, 2 = External edge, 3 = External level)
•
B4 - Trigger the waveform sequence using the MSP430
3. Choose either the on-board ERM or LRA using buttons B1 or B2. Either button sets the EN pin high
and turns on the “Active” LED.
4. Begin controlling the DRV2605 using the external I
2
C source.
19
SLOU348B – January 2013 – Revised March 2014
DRV2605EVM-CT ERM and LRA Haptic Driver Evaluation Kit
Copyright © 2013–2014, Texas Instruments Incorporated