JP1

R3

R2

R1

VDD

DRV2603

EN

ERM/LRA

PWM

GND

OUT+

OUT-

MSP430

P3.0

PWM

VDD

P3.1

R8

EN

PWM

Hardware Configuration

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3.5

Enable Pin Source

Figure 10. External Enable

The enable pin on the DRV2603 is controlled by the MSP430. To use an external control source or GPIO

there are two options.

Using the Additional Hardware Modes in the MSP430 firmware, select "Mode 5" which will Hi-Z the

MSP430 I/O enable control pin so it does not interfere with the external enable control source.

1. Enter Additional Hardware Modes by holding the "+" button until the actuator buzzes and the mode

LEDs blink.

2. Select Mode 5 (00101'b) using the increment mode button ("+").

3. Connect the external control source to the EN test point at the top of the board.

4. In Mode 5, press one of the following buttons to Hi-Z the DRV2603 enable (EN) pin.

•

B1 - disable Hi-Z mode

•

B2 - Hi-Z MSP430 EN pin, select LRA auto-resonance on

•

B3 - Hi-Z MSP430 EN pin, select LRA auto-resonance off

•

B4 - Hi-Z MSP430 EN pin, select ERM mode

To physically disconnect the MSP430 from the DRV2603 enable pin:

1. Remove resistor R8 which disconnects the MSP430 from the DRV2603.

2. Connect the external control source to the EN test point at the top of the board.

10

DRV2603 ERM/LRA Haptic Driver Evaluation Kit

SLOU340A – May 2012 – Revised May 2012

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