DRV2603ERM Datasheet, PDF (11/28 Pages) Texas Instruments – DRV2603 ERM/LRA Haptic Driver Evaluation Kit

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3.6 LRA/ERM Mode 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 11. Hardware Select Actuator Mode
The DRV2603EVM-CT includes both an LRA and ERM actuator. By default, the MSP430 firmware will
apply the appropriate logic voltage to the DRV2603 actuator select pin (LRA/ERM) and select the
appropriate actuator using an on-board load switch (U5).
To manually select the on-board actuator using the MSP430 firmware:
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 and select the appropriate
actuator.
• B1 - disable the DRV2603
• B2 - select the on-board LRA and enable the DRV2603
• B3 - select the on-board LRA and enable the DRV2603
• B4 - select the on-board ERM and enable the DRV2603
4. If the DRV2603 is enabled, the "EN" LED will glow.
To manually set the actuator select pin using hardware, use resistors R1, R2, and R3 to configure the
DRV2603 .
1. Remove resistor R1, which will disconnect the MSP430.
2. To select LRA mode, add a 0Ω resistor across R2 which will short the pin to VBAT.
3. To select ERM mode, add a 0Ω resistor across R3 which will short the pin to ground.
To manually select either the on-board ERM or LRA actuator using hardware:
1. Remove resistor R34 which will disconnect the MSP430.
2. To select the LRA, place a 0Ω resistor across R35.
3. To select the ERM, no additional resistors are needed.
SLOU340A – May 2012 – Revised May 2012
DRV2603 ERM/LRA Haptic Driver Evaluation Kit
11
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