DA7282 datasheet(49/75 Pages) RENESAS

49 / 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 49

6.9.2

PWM Mode

PWM provides mark / space ratio between 0 % and 100 %. The interpretation of duty cycle depends on the state

of ACCELERATION_EN.

▪ For ACCELERATION_EN = 0:

• A 0 % duty cycle corresponds to -100 % driving strength.

• A 50 % duty cycle corresponds to no drive.

• A 100 % duty cycle corresponds to +100 % driving strength.

• FULL_BRAKE_THR defines a lower threshold for driving strength, below this threshold, drive is interpreted

as zero.

▪ For ACCELERATION_EN = 1:

• A 0 % duty cycle corresponds to no drive.

• A 50 % duty cycle corresponds to +50 % driving strength.

• A 100 % duty cycle corresponds to +100 % driving strength.

• Negative drive is not possible.

• FULL_BRAKE_THR defines a lower threshold for driving strength, below this threshold, drive is interpreted

as zero.

The encoded value of PWM data is converted to 8-bit two’s complement data using the DRO format and is

written to OVERRIDE_VAL so it can be read back.

6.9.3

RTWM and ETWM Modes

▪ For ACCELERATION_EN = 0:

• The 4 bits of the amplitude value are interpreted as a two’s complement signed value.

• The most negative value corresponds to -100 % driving strength.

• The most positive value corresponds to +100 % driving strength.

• A zero value corresponds to no drive.

• The full range is between 7 (100 %) and -7 (-100 %), with -8 interpreted as -7 to keep the ranges

symmetrical.

▪ ACCELERATION_EN = 1

• The 4 bits of the amplitude value are interpreted as an unsigned value.

• The most positive value corresponds to +100 % driving strength.

• Negative drive is not possible.

• A zero value corresponds to no drive.

DA7282 Datasheet(PDF) 49 Page - Renesas Technology Corp