DA7282 datasheet(65/75 Pages) RENESAS

65 / 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 65

Bit

Mode

Symbol

Description

Reset

�� (��)

= 1333.32 × 10−9 × (128

× ��_��_��_��

+ ��_��_��_��)

Table 65. FRQ_LRA_PER_ACT_L (0x0047)

Bit

Mode

Symbol

Description

Reset

[6:0]

LRA_PER_ACTUAL_L

LSBs of the actual LRA resonant period based on half-period, see

Section 6.5.The following formula describes the output:

�� (��)

= 1333.32 × 10−9 × (128

× ��_��_��_��

+ ��_��_��_��)

0x4F

Table 66. FRQ_PHASE_H (0x0048)

Bit

Mode

Symbol

Description

Reset

[7:0]

DELAY_H

Used during custom waveform operation, see Section 6.7.5. Only

use the following settings, all other settings are reserved:

0x0 = Setting for wideband mode

0x25 = Setting for closed-loop frequency tracking mode

0x25

Table 67. FRQ_PHASE_L (0x0049)

Bit

Mode

Symbol

Description

Reset

[7]

DELAY_FREEZE

Used during custom waveform operation. Set to 1 only in wideband

mode with frequency tracking disabled, see Section 6.7.5

0x0 = Setting for closed-loop frequency tracking mode

0x1 = Setting for wideband mode

0x0

[2:0]

DELAY_SHIFT_L

Used during custom waveform operation, see Section 6.7.5. Only

use the following settings, all other settings are reserved:

0x0 = Setting for wideband mode

0x5 = Setting for closed-loop frequency tracking mode

0x5

Table 68. FRQ_CTL (0x004C)

Bit

Mode

Symbol

Description

Reset

[1]

FREQ_TRACKING_AUTO_ADJ

Enables the auto-scaling of the frequency tracking

proportional coefficient, see Section 6.7.1

0x0 = No auto-scaling

0x1 = Auto-scaling

0x1

[0]

FREQ_TRACKING_FORCE_ON

Force the tracking on when the error exceeds 25 % of initial

guess, see Section 6.7.1

0x0 = Off

0x1 = On

0x0

Table 69. TRIM3 (0x005F)

Bit

Mode

Symbol

Description

Reset

[6]

LOOP_IDAC_DOUBLE_RANGE

Loop IDAC double range control, see Section 6.7.12

0x0

[5]

LOOP_FILT_LOW_BW

Loop filter low bandwidth, see Section 6.7.9

0x0

[4:3]

REF_UVLO_THRES

UVLO threshold, see Section 6.7.10

0x1

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