DA7282 datasheet(41/75 Pages) RENESAS

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LRA/ERM Ultra-Low Power Haptic Driver with Multiple Input Triggers and Integrated Waveform Memory

R15DS0041EE0330 Rev.3.30

June 16, 2026

CFR0011-120-00

Page 41

6.8

Waveform Memory

The Waveform Memory stores haptic drive sequences. A single haptic effect is called a sequence, and each

sequence is formed by one or more frames that address one or more snippets stored in memory. The overall

Waveform Memory structure is described in detail in Section 6.8.1; Sections 6.8.2 to 6.8.4 provide definitions for

snippets, frames, and sequences.

NOTE

It is recommended that the Renesas SmartCanvas GUI is used to construct sequences and upload them to the Waveform

Memory. The easy-to-use GUI provides intuitive visualization of the sequences in the Waveform Memory and requires

only basic knowledge of the overall memory format.

6.8.1

Waveform Memory Structure

The waveform memory structure has a 100-byte capacity for storing snippets, frames, and sequences.

Sequences reference the snippets using frames to allow complex haptic sequences to be created in a memory

efficient manner. The overall structure of the Waveform Memory can be seen in Figure 25. For Waveform

Memory programming, see Section 6.6.4.

num_of_snippets[7:0]

num_of_sequences[7:0]

snippet_1_endpointer

snippet_n_endpointer

sequence_0_endpointer

snippet_n

sequence_0

sequence_n

sequence_n_endpointer

snippet_1

snippet_1_endpointer

WAVEFORM MEMORY

100 Bytes

Byte 0

Byte 1

Byte 2

Byte n

PWL_point_ 0

PWL_point_n

frame_0

frame_n

Figure 25. Waveform memory structure

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