JP1

R3

R2

R1

VDD

DRV2603

EN

ERM/LRA

PWM

GND

OUT+

OUT-

MSP430

P3.0

PWM

VDD

P3.1

R8

EN

PWM

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Hardware Configuration

3.4

PWM Input Source

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

PWM Source

Shorted

MSP430

Open

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.

9

SLOU340A – May 2012 – Revised May 2012

DRV2603 ERM/LRA Haptic Driver Evaluation Kit

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