DRV2625 Datasheet, PDF (18/77 Pages) Texas Instruments – DRV2625 Ultra Low Power Closed-Loop LRA/ERM Haptic Driver with Built-In Library

DRV2625
SLOS879A – DECEMBER 2015 – REVISED DECEMBER 2015
TRIG/INTZ Trigger
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Haptic Waveform
TRIG/INTZ Trigger
Stop Waveform
Haptic Waveform
Figure 19. TRIG/INTZ Functionality in Trigger-Pulse Mode
8.3.16.2 Trigger-Level (Enable) Functionality
The trigger-level (enable) functionality allows for an external micro-controller to wake up the DRV2625 by
asserting the TRIG/INTZ pin (high), which immediately starts playing the process (either waveform sequencer,
RTP value, diagnostics or auto-calibration). Once the TRIG/INTZ pin de-asserts (low) the device goes back to
standby state to preserve power. If braking is desired before going into standby state, the
AUTO_BRK_INTO_STBY bit can be set to allow automatic braking. Note that automatic braking is ignored during
calibration.
TRIG/INTZ Enable
Haptic Waveform with RTP
Initial RTP value
RTP update through I²C RTP update through I²C
TRIG/INTZ Enable
Haptic Waveform with RTP
Initial RTP value
Figure 20. TRIG/INTZ Functionality in Trigger-Level (Enable) Mode
8.3.16.3 Interrupt Functionality
The interrupt functionality allows for the DRV2625 to communicate to an external processor that a particular
condition has occurred. When configured as an interrupt, the TRIG/INTZ pin becomes an output in open-drain
configuration. An external pull-up is required for this mode. When asserted, the TRIG/INTZ pin will pull down the
node until the interrupt is cleared (which is done by a reading the status register). All interrupts are maskable. A
description of the supported interrupts is as follows:
OC_DETECT is flagged if an over-current event happens in the output stage during a process execution (such
as waveform playback or auto-calibration).
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