DRV2605L-Q1 Datasheet, PDF (36/67 Pages) Texas Instruments – Automotive Haptic Driver for LRA and ERM

DRV2605L-Q1
SLOS874A – OCTOBER 2015 – REVISED OCTOBER 2015
www.ti.com
7.6.5 Waveform Sequencer (Address: 0x04 to 0x0B)
Figure 33. Waveform Sequencer Register
7
6
5
4
3
2
1
0
WAIT
WAV_FRM_SEQ[6:0]
R/W-0
R/W-0
Table 8. Waveform Sequencer Register Field Descriptions
BIT FIELD
7 WAIT
6-0 WAV_FRM_SEQ
TYPE
R/W
R/W
DEFAULT
0
0
DESCRIPTION
When this bit is set, the WAV_FRM_SEQ[6:0] bit is interpreted as a wait
time in which the playback engine idles. This bit is used to insert timed
delays between sequentially played waveforms.
Delay time = 10 ms × WAV_FRM_SEQ[6:0]
If WAIT = 0, then WAV_FRM_SEQ[6:0] is interpreted as a waveform
identifier for sequence playback.
Waveform sequence value. This bit holds the waveform identifier of the
waveform to be played. A waveform identifier is an integer value referring
to the index position of a waveform in a ROM library. Playback begins at
register address 0x04 when the user asserts the GO bit (register 0x0C).
When playback of that waveform ends, the waveform sequencer plays the
next waveform identifier held in register 0x05, if the next waveform
identifier is non-zero. The waveform sequencer continues in this way until
the sequencer reaches an identifier value of zero, or all eight identifiers are
played (register addresses 0x04 through 0x0B), whichever comes first.
7.6.6 GO (Address: 0x0C)
Figure 34. GO Register
7
6
5
4
3
2
Reserved
1
0
GO
R/W-0
BIT FIELD
7-1 Reserved
0
GO
Table 9. GO Register Field Descriptions
TYPE
DEFAULT DESCRIPTION
R/W
0
This bit is used to fire processes in the DRV2605L-Q1 device. The
process fired by the GO bit is selected by the MODE[2:0] bit (register
0x01). The primary function of this bit is to fire playback of the waveform
identifiers in the waveform sequencer (registers 0x04 to 0x0B), in which
case, this bit can be thought of a software trigger for haptic waveforms.
The GO bit remains high until the playback of the haptic waveform
sequence is complete. Clearing the GO bit during waveform playback
cancels the waveform sequence. Using one of the external trigger modes
can cause the GO bit to be set or cleared by the external trigger pin. This
bit can also be used to fire the auto-calibration process or the diagnostic
process.
36
Submit Documentation Feedback
Product Folder Links: DRV2605L-Q1
Copyright © 2015, Texas Instruments Incorporated