DA7282-00FVC datasheet(32/75 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 32

6.6.6

Events and Diagnostics

DA7282 supports a comprehensive system for device, supply, and actuator diagnostics based on faults,

warnings, and notifications. Faults return DA7282 to IDLE state and hold the system in IDLE until cleared, while

warnings and notifications are used for host information only. If events are generated, the host is notified by the

open-drain nIRQ pin pulling low.

A single IRQ_EVENT1 byte containing all faults is presented to the host for simplified signaling. Warnings are

reported via IRQ_EVENT_WARNING_DIAG and input data faults via IRQ_EVENT_SEQ_DIAG. Table 13

provides a summary of the full array of faults:

Table 13. Haptic event flag descriptions

Event Name

Description

Required action

Faults

E_OC_FAULT

Short circuit / over-current fault

Write 1 to clear

E_ACTUATOR_FAULT

An issue detected with the actuator impedance,

BEMF amplitude, or resonant frequency

Write 1 to clear

E_SEQ_FAULT

Sequence ID, Waveform Memory, or PWM fault has

occurred

Read IRQ_EVENT_SEQ_DIAG for

diagnostic information

E_OVERTEMP_CRIT

Over-temperature event

Write 1 to clear

E_UVLO

Under-voltage fault

Write 1 to clear

Notifications

E_SEQ_DONE

Memory sequence playback is complete

Write 1 to clear

E_SEQ_CONTINUE

Playback of a new sequence has started by the host

setting SEQ_CONTINUE

Write 1 to clear

E_WARNING

A system warning is in effect

Read warnings in

IRQ_EVENT_WARNING_DIAG

E_ADC_SAT

The input to the voltage sense ADC has saturated

Check if V2I_FACTOR_H/L is set

correctly for the driven actuator

Warnings

E_LIM_DRIVE

Playback is limited due to battery lower than

sequence target

Reduce drive level if needed

E_LIM_DRIVE_ACC

Acceleration is limited due battery lower than

overdrive level

Reduce drive level if needed

E_MEM_TYPE

Input memory data type does not match acceleration

configuration

Check data format

Input Data Faults

E_SEQ_ID_FAULT

Requested sequence ID does not exist

Reload PS_SEQ_ID and Waveform

Memory

E_MEM_FAULT

Waveform Memory corruption (empty bytes, non-

existent snippet ID, wrong frame parameter)

Reload Waveform Memory

E_PWM_FAULT

PWM timeout

Restart PWM interface and write 1 to

E_SEQ_FAULT to clear

All events are write 1 to clear and can be masked using IRQ_MASK1 and IRQ_MASK2. Some of the sources

generating E_ACTUATOR_FAULT can be disabled, for frequency tracking see Section 6.7.1 and for BEMF

voltage amplitude see Section 6.7.14. For self-clearing of faults once in IDLE state, see Section 6.7.7.

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