DA7282-00FVC datasheet(32/88 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

32 of 87

5.6.5

Mode Configuration

Set OPERATION_MODE according to the operating mode to be used. The device configuration flow

is different for each operating mode. Sections 5.6.5.1 to 5.6.5.5 explain how to set up and operate

the device in each of the operating modes.

5.6.5.1

Inactive Mode

In Inactive mode, DA7282 waits in a low-power state in between playback events. For more details

on power and latency trade-offs see Sections 5.2.1 and 5.2.3.

1. Set OPERATION_MODE = 0 for DA7282 to go to Inactive mode.

2. Configure STANDBY_EN to return to IDLE or STANDBY state after playback has finished.

5.6.5.2

Direct Register Override (DRO) Mode

Figure 13 shows how to operate the device in DRO mode.

1. Starting from either the IDLE or STANDBY state, write the initial drive amplitude of the haptic

sequence to OVERRIDE_VAL.

2. When ready to begin playback, set OPERATION_MODE = 1. The output will begin switching

after approximately 0.75 ms.

3. While in the DRIVE state, write to OVERRIDE_VAL to drive a new amplitude and create the

desired envelope of the haptic sequence. If OVERRIDE_VAL = 0 during the DRIVE state,

DA7282 will disable its output stage, but remain in a low latency-to-drive state and wait for further

updates to OVERRIDE_VAL.

4. To stop driving set OPERATION_MODE = 0. DA7282 returns to either the IDLE or STANDBY

state, depending on the value of STANDBY_EN.

Note: The allowable range of values written to OVERRIDE_VAL depends on whether

ACCELERATION_EN is set to 1 or 0. If ACCELERATION_EN = 1 then the usable range for

OVERRIDE_VAL is 0x00 to 0x7F. If ACCELERATION_EN = 0 then the usable range for

VERRIDE_VAL is 0x00 to 0xFF in two’s complement. For further explanation, see Figure 31 and

Figure 32.

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