DA7280 datasheet(49/80 Pages) RENESAS

49 / 80 page

DA7280-Automotive

Wideband LRA/ERM Haptic Driver for Automotive

Applications

Datasheet

Revision 1.4

01-Mar-2022

CFR0011-120-00

49 of 79

Waveform Memory

Sequence 0 Addr Pointer

Snippet 1 Addr Pointer

Example Snippet_1

Snippet_M

Example Sequence_0

snippet 7

0dB

2 loops

Example Sequence_3

SEQ_0_FR_0

snippet 1

Timebase

20ms

-6dB

0 loops

SEQ_0_FR_1

Freq :90Hz

SEQ_3_FR_0

snippet 5

Timebase

5ms

-6dB

1 loops

snippet 2

Timebase

20ms

0dB

0 loops

SEQ_3_FR_1

Freq :162.5Hz

Wideband

Sequence_N

Snip 7,

@20ms

snippet 1

Timebase

40ms

0dB

0 loops

SEQ_0_FR_2

Snip 1

@ -6dB,

20ms

loop 1

loop 2

Snip 1

@ 0dB, 40ms

Narrowband Example , Sequence 0

Time

PWL : P1 = Ramp to 80%, time 4

PWL : P2 = Step to 80%, time 2

PWL : P3 = Ramp to 0%, time 4

Time

Wideband Example , Sequence 3

Snip 5

@90Hz

loop 1

@90Hz

Snip 2 @162.5Hz

PWL : P1 = Ramp to 60%, time 3

PWL : P2 = Step to 0%, time 1

PWL : P3 = Ramp to 40%, time 2

Example Snippet_5

snippet 7

Timebase

5ms

0dB

0 loops

SEQ_3_FR_3

snippet 0

Timebase 20ms

0 loops

SEQ_3_FR_2

Snip 7, @5ms,

162.5Hz

Timebase

20ms

PWL : P1 = Step to 50%, time 1

PWL : P2 = Step to 00%, time 1

Example Snippet_7

PWL : P1 = Ramp to 50%, time 4

PWL : P2 = Step to 50%, time 1

PWL : P3 = Step to 100%, time 3

PWL : P4 = Step to 0%, time 2

Example Snippet_2

Snip 0

Three loops of Snippet 7

played with 20ms

timebase and 0dB gain

Snippet 1

is played

at 20ms

timebase

and -6dB

gain

LRA drive

frequency set @

90Hz.

Two loops of

Snippet 5, 5ms

timebase, -6dB

gain.

LRA drive

frequency set @

162.5Hz.

Snippet 2 is

played once at

20ms timebase,

0dB gain

LRA drive

frequency set

@ 162.5Hz.

Snippet 7

played with

5ms timebase

and 0dB gain

40ms

silence

Snippet 1 is

played at 40ms

timebase and

0dB gain.

Number of Sequences

Number of Snippets

Snippet 2 Addr Pointer

Snippet 5 Addr Pointer

Sequence 3 Addr Pointer

Figure 29: Waveform Memory Example

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