DA7282 datasheet(28/75 Pages) RENESAS

28 / 75 page

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 28

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.

I2C write to stop driving

I2C writes to start driving

Apply PWM signal

to GPI_0/PWM pin

Output starts

switching

Write

OPERATION_

MODE = 2

IDLE/STANDBY

DRIVE

Write

OPERATION_

MODE = 0

DA7282

stops

driving

Change the duty

cycle of the PWM

signal

Drive

amplitude

changes

Figure 14. Operation in PWM mode

6.6.5.4

The following registers should be set up prior to operation in RTWM mode:

▪ Set FREQ_WAVEFORM_TIMEBASE according to the minimum or maximum sequence timebase required.

▪ Set SNP_MEM_x (where x = 0 to 99), see Section 6.8.

▪ If custom waveform sequences are required, see Section 6.7.5.

▪ Set WAV_MEM_LOCK = 0 to prohibit access to the waveform memory if required.

Figure 15 shows how to operate the device in RTWM mode.

1. While in the IDLE or STANDBY state, configure PS_SEQ_ID and PS_SEQ_LOOP to select the desired

sequence from Waveform Memory.

2. For first-time playback, set OPERATION_MODE = 3. On subsequent sequence playbacks, this step can be

skipped (if OPERATION_MODE = 3). The haptic sequence will not begin playing until a start event is

created by setting SEQ_START = 1.

DA7282 Datasheet(PDF) 28 Page - Renesas Technology Corp

DA7282 Datasheet(HTML) 28 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75

Datasheet Download

Link URL