DRV2624 Datasheet, PDF (44/79 Pages) Texas Instruments – DRV2624 Ultra Low Power Closed-Loop LRA/ERM Haptic Driver with Internal Memory

DRV2624
SLOS893A – DECEMBER 2015 – REVISED DECEMBER 2015
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8.7.14 Address: 0x0C
Figure 58. 0x0C
7
6
5
4
3
2
Reserved
R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 15. Address: 0x0C
1
0
GO[0]
R/W-0
BIT FIELD
7-1 Reserved
0 GO
TYPE
R/W
R/W
DEFAULT DESCRIPTION
0
Reserved
0
This bit is used to fire processes. The process fired by the GO bit is selected by the MODE
parameter. The primary function of this bit is to fire playback of the waveform identifiers in he
waveform sequencer (registers 0x0F to 0x16), in which case, this bit an be thought of a
software trigger for haptic waveforms. The GO bit emains high until the process has completed.
Clearing the GO bit during waveform playback cancels the process immediately. Using the
external trigger will also assert the GO bit in a similar way as if it was written. The GO bit can
be used to play effects using the waveform sequencer, run auto-calibration, and run
diagnostics.
8.7.15 Address: 0x0D
Figure 59. 0x0D
7
6
5
4
3
2
Reserved
PLAYBACK_IN
TERVAL[0]
Reserved
R/W-0
R/W-0
R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
1
0
DIG_MEM_GAIN[1:0]
R/W-0
BIT FIELD
7-6 Reserved
5 PLAYBACK_INTERVAL
4-2 Reserved
1-0 DIG_MEM_GAIN[1:0]
Table 16. Address: 0x0D
TYPE
R/W
R/W
R/W
R/W
DEFAULT DESCRIPTION
0
Reserved
0
Sets the internal memory playback interval to either 5 ms or 1 ms.
0
5 ms.
1
1 ms.
0
Reserved
0
This parameter allows for proportionally scaling down (attenuating) the effects stored in the
internal library to simplify the customization of haptics. This parameter is ignored in RTP mode.
0
Play effect with 100% strength.
1
Play effect with 75% strength.
2
Play effect with 50% strength.
3
Play effect with 25% strength.
8.7.16 Address: 0x0E
Figure 60. 0x0E
7
6
5
4
3
RTP_INPUT[7:0]
R/W-0
R/W-1
R/W-1
R/W-1
R/W-1
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
2
R/W-1
1
R/W-1
0
R/W-1
BIT FIELD
7-0 RTP_INPUT[7:0]
Table 17. Address: 0x0E
TYPE
R/W
DEFAULT DESCRIPTION
127 This parameter is the entry point for real-time playback (RTP) data. The digital playback engine
drives the RTP_INPUT[7:0] value to the load when MODE[1:0] parameter is set to RTP mode,
and the RTP process is triggered. The RTP_INPUT[7:0] value can be updated in real-time by
the host controller to create haptic waveforms. The TP_INPUT[7:0] value is interpreted as an 8
bit signed number.
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