DA7282-00FVC datasheet(44/75 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 44

All frame parameters except COMMAND_TYPE, SNP_ID_L, GAIN, and TIMEBASE are optional. For a full

description, see Table 19.

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Byte 1 =>

COMMAND_TYPE

= 0

GAIN [1:0]

TIMEBASE[1:0]

SNP_ID_L[2:0]

Byte 2 =>

COMMAND_TYPE

= 1

SNP_ID_LOOP[3:0]

FREQ_CMD

FREQ[8]

SNP_ID_H

Byte 3 =>

FREQ[7:0]

Figure 28. Command structure for a single frame

Table 19. Bit definitions for frame parameters

Byte

number

definitions

Description

1 and/or 2

COMMAND_TYPE

COMMAND_TYPE labels the byte and tells the system how to interpret the

following seven LSBs.

COMMAND_TYPE = 0 in Byte 1

COMMAND_TYPE = 1 signifies Byte 2 is present

GAIN[1:0]

Gain applied to the snippet identified by SNP_ID_L/H:

00 = 0 dB

01 = -6 dB

10 = -12 dB

11 = -18 dB

TIMEBASE[1:0]

The timebase length of the snippet pointed to by the snippet ID. This register is

interpreted differently depending on FREQ_WAVEFORM_TIMEBASE:

If FREQ_WAVEFORM_TIMEBASE = 0 (default):

00 = 5.44 ms

01 = 21.76 ms

10 = 43.52 ms

11 = 87.04 ms

If FREQ_WAVEFORM_TIMEBASE = 1:

00 = 1.36 ms

01 = 5.44 ms

10 = 21.76 ms

11 = 43.52 ms

SNP_ID_L[2:0]

SNP_ID_L is mandatory and contains the LSBs of the snippet ID (SNP_ID). Up to

eight snippets can be addressed.

SNP_ID_LOOP[3:0]

SNP_ID_LOOP is the loop multiplier of the snippet identified by SNP_ID_L/H and

shows how many times a snippet is looped. If not present, the loop multiplier is 1.

The number of loop iterations is equal to SNP_ID_LOOP + 1 (that is, 0 = 1 iteration,

15 = 16 iterations). When the loop multiplier is > 1, playback begins from P1 instead

of P0, see Figure 27, after the first playback loop is complete.

FREQ_CMD

If FREQ_CMD = 1, the frame is a 3-byte command with frequency information. The

frequency information is stored in FREQ[7:0].

FREQ[8]

Drive frequency MSB. The total frequency range is represented by the 9-bit

concatenation of FREQ[8] and FREQ[7:0] (possible values: 0 to 511), which

corresponds to the range 1 Hz to 1024 Hz. The LSB step size is 2 Hz and values

below 25 Hz are interpreted as 25 Hz. The result is also converted from frequency

to period and stored in the FRQ_LRA_PER_ACT_x registers for read-back.

SNP_ID_H

SNP_ID_H is the MSB of the snippet ID (SNP_ID). This can be used to increase the

range of addressable snippets from 8 to 16. This bit is optional and if not present

SNP_ID_H = 0.

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