DRV2603ERM Datasheet, PDF (9/28 Pages) Texas Instruments – DRV2603 ERM/LRA Haptic Driver Evaluation Kit

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3.4 PWM Input Source
MSP430
P3.1
PWM
JP1
P3.0
EN PWM
Hardware Configuration
R8
VDD
R2
R1
R3
DRV2603
EN
PWM
ERM/LRA
OUT+
GND
VDD
OUT-
Figure 9. External PWM Input
The DRV2603 input signal can be driven by the on-board MSP430 PWM or an external PWM source. The
input source is selected by shorting or disconnecting JP1.
JP1
Shorted
Open
PWM Source
MSP430
External PWM using PWM testpoint
To set the DRV2603 enable pin high while using an external PWM source:
1. Enter Additional Hardware Modes by holding the "+" button until the actuator buzzes and the mode
LEDs blink.
2. Select Mode 3 (00011'b) using the increment mode button ("+").
3. In Mode 3, press one of the following buttons to enable the DRV2603.
• B1 - disable the DRV2603
• B2 - enable with LRA auto-resonance on
• B3 - enable with LRA auto-resonance off
• B4 - enable in ERM mode
4. If the DRV2603 is enabled, the "EN" LED will glow.
SLOU340A – May 2012 – Revised May 2012
DRV2603 ERM/LRA Haptic Driver Evaluation Kit
9
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