DRV2625 Datasheet, PDF (40/77 Pages) Texas Instruments – DRV2625 Ultra Low Power Closed-Loop LRA/ERM Haptic Driver with Built-In Library

DRV2625
SLOS879A – DECEMBER 2015 – REVISED DECEMBER 2015
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8.7.9 Address: 0x08
Figure 50. 0x08
7
6
5
4
LRA_ERM[0] CONTROL_LO HYBRID_LOOP AUTO_BRK_O
OP[0]
[0]
L[0]
R/W-1
R/W-0
R/W-0
R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
3
AUTO_BRK_IN
TO_STBY[0]
R/W-1
2
INPUT_SLOPE
_CHECK[0]
R/W-0
Table 12. Address: 0x08
1
0
Reserved
R/W-0
BIT FIELD
7 LRA_ERM
6 CONTROL_LOOP
5 HYBRID_LOOP
4 AUTO_BRK_OL
3 AUTO_BRK_INTO_STBY
2 INPUT_SLOPE_CHECK
1-0 Reserved
TYPE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
DEFAULT DESCRIPTION
1
Selects the actuator type. This bit should be set prior to running the calibration routine.
0
ERM.
1
LRA.
0
Selects either closed loop or open loop mode. This applies to both ERM and LRA actuators.
0
Closed Loop.
1
Open Loop.
0
Selects between full closed loop mode and hybrid closed-loop mode.
0
Full closed loop mode.
1
Hybrid loop mode.
0
Provides automatic braking for ERM and LRA when in open loop. To achieve this, when the
data to be played is 0 or less, the DRV2625 device automatically goes into closed loop mode
and then brakes the actuator. Note that when the data to be played is positive the device will
play in open loop mode. This feature assumes that the actuator has been calibrated and that it
functions correctly under closed-loop conditions. This feature is disabled by default.
0
No automatic braking while in open loop mode.
1
Automatic braking for open loop mode is enabled. Goes to closed-loop mode to break
when data is 0 or less.
1
This bit is used to enable automatic braking when the device goes into standby. If this bit is set
and a waveform was playing, when a go-to-standby signal is received (either from the timer, or
the EN functionality of the TRIG/INTZ pin), the device will first brake the actuator and then will
transition to the standby mode.
0
Go immediately to standby mode (without automatic braking).
Before going to standby mode, check if the actuator is moving. If it is moving brake
1
the actuator and then go to standby mode. If it is not moving then go into standby
mode.
0
If bit is set, driver will operate in open loop and will only change to close loop if the transition
requested is big enough. This bit is ignored if hybrid loop is disabled.
0
No input slope check.
1
Input slope check enabled
0
Reserved
40
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