DA7282-00FVC datasheet(33/88 Pages) RENESAS

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DA7282

LRA/ERM Ultra-Low Power Haptic Driver with

Multiple Input Triggers and Integrated

Waveform Memory

Datasheet

Revision 3.1

10-Feb-2022

CFR0011-120-00

33 of 87

2C write to stop driving

2C writes to start driving

Write to register

OVERRIDE_VAL

Output starts

switching

Write

OPERATION_

MODE = 1

IDLE/STANDBY

DRIVE

Write

OPERATION_

MODE = 0

DA7282

stops

driving

Change

OVERRIDE_VAL

Drive

amplitude

changes

The allowable range

differs depending on

the state of

ACCELERATION_EN

Figure 13: Operation in DRO Mode

5.6.5.3

PWM Mode

Figure 14 shows how to operate the device in PWM mode.

1. Starting from either the IDLE or STANDBY state, apply a PWM signal to the GPI_0/PWM pin.

2. When ready to begin playback, set OPERATION_MODE = 2. The output will begin switching

after approximately 0.75 ms with a drive amplitude proportional to the duty cycle of the incoming

PWM signal.

3. While in the DRIVE state, update the duty cycle of the PWM signal to drive a new amplitude level

and create the desired envelope of the haptic sequence. If the duty cycle of the PWM signal falls

below the threshold set by FULL_BRAKE_THR, it is interpreted as a zero output drive level.

4. In order to stop driving, set OPERATION_MODE = 0. DA7282 will return to either the IDLE or

STANDBY state depending on the value of STANDBY_EN.

Note: The duty cycle of the PWM signal is interpreted differently depending on the value of

ACCELERATION_EN. If ACCELERATION_EN = 1, then zero drive corresponds to 50 % duty cycle

FULL_BRAKE_THR. If ACCELERATION_EN = 0, then zero drive corresponds to 0 % duty cycle +

FULL_BRAKE_THR. For further explanation, see Figure 31 and Figure 32.

DA7282-00FVC Datasheet(PDF) 33 Page - Renesas Technology Corp

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