DA7283

Ultra-Low Power LRA Haptic Driver with Multiple Input

Triggers and Software-Free Operation

Datasheet

Revision 3.0

30-Jul-2019

CFR0011-120-00

13 of 22

© 2019 Dialog Semiconductor

5.2

Functional Modes

5.2.1

System States

The device states and the transitions into and out of each state are shown in Figure 5. When a power

supply is applied on the VDD pin and VDDIO/EN pin is set high, DA7283 loads its initial boot

settings. Once BOOT is complete, DA7283 remains in the IDLE state, ensuring low power

consumption and low start-up latency, and awaits GPI triggering. DA7283 enters the DRIVE state

and starts playback when one of the three GPI pins receives a falling edge from the host controlling

the device, see Section 5.2.2. On playback completion, caused either by a GPI triggered sequence

reaching its end or a second negative edge on any of the GPIs, DA7283 leaves the DRIVE state and

returns to IDLE.

If a fault condition arises during playback, DA7283 cancels the ongoing playback and returns to the

IDLE state. Possible fault conditions include an UVLO event, an over-temperature event, a short

circuit protection event, and an actuator over- or under-impedance event.

IDLE

BOOT

Boot

complete

in 1.5 ms

OFF

DRIVE

Start driving

0.75 ms after GPI

trigger

VDD

V

VDDIOEN

V

Stop driving

after timeout

or GPI trigger

DA7283 returns to

the IDLE state in a

fault condition

Return to OFF at any

time if:

VDDIOEN = 0 V or

VDD < 2.6 V

Figure 5: System State Diagram

Note: An optional one-time device configuration can be performed after the initial BOOT sequence

by going once through the DRIVE state via GPI_2, see Section 5.3.1.