DA7282-00FVC datasheet(30/77 Pages) DIALOG

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DA7282

LRA/ERM Ultra-Low Power Haptic Driver with Multiple

Input Triggers and Integrated Waveform Memory

Datasheet

Revision 3.0

30-Jul-2019

CFR0011-120-00

30 of 77

5.6.5.4

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 5.8.

● 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 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.

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

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

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

of STANDBY_EN.

5. Clear the nIRQ and SEQ_DONE_M signals, set SEQ_DONE_M =1.

6. At any time during operation in RTWM mode, set OPERATION_MODE or SEQ_START = 0 to

return to the IDLE or STANDBY state.

Output starts

switching

Write

OPERATION_MODE = 3

IDLE/STANDBY

Sequence

playback

Write SEQ_DONE_M = 1

to clear register and nIRQ

DA7282

ready to

play next

sequence

Sequence is

continued

Are PS_SEQ_ID and

PS_SEQ_LOOP already

configured?

Configure the

PS_SEQ_LOOP

Yes

Create a start

event by writing to

SEQ_START

SEQ_CONTINUE = 1?

Select a sequence

via PS_SEQ_ID

Yes

OPERATION_MODE = 3?

Yes

nIRQ = 0 and

SEQ_DONE_M = 1

Sequence playback is

complete and output

stops switching

SEQ_CONTINUE

can be set if

required during

playback

Can be skipped

for subsequent

sequence

playbacks

Figure 15: Operation in RTWM Mode

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