DA7280 datasheet(27/76 Pages) DIALOG

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DA7280

LRA/ERM Haptic Driver with Multiple Input Triggers,

Integrated Waveform Memory and Wideband Support

Datasheet

Revision 3.0

30-Jul-2019

CFR0011-120-00

27 of 76

5.6.4

Waveform Memory Setup

The Waveform Memory is initially empty. The user can create any set of haptic sequences by

following the Waveform Memory format described in Section 5.8. For ease of use, the Dialog

SmartCanvas GUI also provides a graphical tool to create sequences. The sequences can then be

uploaded to the DA7280 Waveform Memory by going through the following steps:

1. Ensure that DA7280 is in Inactive mode (no playback ongoing and at least 1.5 ms have passed

since cold boot).

2. Ensure the Waveform Memory is unlocked, set WAV_MEM_LOCK = 1.

3. Read back the location of SNP_MEM_0 by checking WAV_MEM_BASE_ADDR.

4. Write the new contents of the Waveform Memory by starting from SNP_MEM_0.

5. If desired, re-lock the Waveform Memory, set WAV_MEM_LOCK = 0.

Once the DA7280 Waveform Memory is configured, it is retained until a power-on reset event. The

host can update the Waveform Memory as many times as needed during the lifetime of the device.

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, DA7280 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 DA7280 to go to Inactive mode.

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

DA7280 Datasheet(PDF) 27 Page - Dialog Semiconductor