DA7282 datasheet(36/88 Pages) RENESAS

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DA7282

LRA/ERM Ultra-Low Power Haptic Driver with

Multiple Input Triggers and Integrated

Waveform Memory

Datasheet

Revision 3.1

10-Feb-2022

CFR0011-120-00

36 of 87

● If custom waveform sequences are required, see Section 5.7.5.

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

Figure 16 shows how to operate the device in ETWM mode.

1. Before first-time playback, set GPIx_SEQUENCE_ID, GPI_x_MODE, and GPIx_POLARITY, see

Section 5.2.7. These bits determine which sequence each of the GPI pins points to, whether they

trigger single or multiple sequences, and whether they react to rising, falling, or both edges.

2. Set PS_SEQ_ID and PS_SEQ_LOOP to select the sequence to play from Waveform Memory

when a start event is created via writing to I2C (SEQ_START). Note: If this has already been

done, then this step can be skipped.

3. Set OPERATION_MODE = 4. On subsequent sequence playbacks, this step can be skipped (if

OPERATION_MODE = 4). Haptic sequences will not begin playing until a start event is detected

either by an edge on one of the GPI pins, or by setting SEQ_START = 1 via I2C.

4. While in the DRIVE state, set SEQ_CONTINUE = 1 to repeat the sequence.

5. When the haptic sequence is completed, DA7282 will signal this by setting nIRQ = 0 and setting

SEQ_DONE = 1. DA7282 will then return to IDLE or STANDBY state, depending on the value of

the STANDBY_EN.

6. Clear the nIRQ and SEQ_DONE_M signals by setting SEQ_DONE_M = 0 via I2C.

At any time during operation in ETWM mode, set OPERATION_MODE or SEQ_START = 0 to return

to IDLE or STANDBY state.

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