DRV2625 Datasheet, PDF (51/77 Pages) Texas Instruments – DRV2625 Ultra Low Power Closed-Loop LRA/ERM Haptic Driver with Built-In Library

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DRV2625
SLOS879A – DECEMBER 2015 – REVISED DECEMBER 2015
8.7.32 Address: 0x20
Figure 73. 0x20
7
R/W-1
6
R/W-0
5
R/W-0
4
3
OD_CLAMP[7:0]
R/W-0
R/W-1
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 35. Address: 0x20
2
R/W-0
1
R/W-0
0
R/W-1
BIT FIELD
7-0 OD_CLAMP[7:0]
TYPE
R/W
DEFAULT DESCRIPTION
137 During closed-loop operation the actuator feedback allows the output voltage to go above the
rated voltage during the automatic overdrive and automatic braking periods. The device limits
this voltage to a maximum voltage defined in this parameter.
8.7.33 Address: 0x21
Figure 74. 0x21
7
6
5
4
3
A_CAL_COMP[7:0]
R/W-0
R/W-0
R/W-0
R/W-0
R/W-1
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
2
R/W-1
1
R/W-0
0
R/W-1
BIT FIELD
7-0 A_CAL_COMP[7:0]
Table 36. Address: 0x21
TYPE
R/W
DEFAULT DESCRIPTION
13
This register contains the voltage-compensation result after execution of the calibration routine.
The value stored in the A_CAL_COMP bit compensates for any resistive losses in the driver.
The calibration routine checks the impedance of he actuator to automatically determine an
appropriate value.
8.7.34 Address: 0x22
Figure 75. 0x22
7
6
5
4
3
A_CAL_BEMF[7:0]
R/W-0
R/W-1
R/W-1
R/W-0
R/W-1
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
2
R/W-1
1
R/W-0
0
R/W-1
BIT FIELD
7-0 A_CAL_BEMF[7:0]
Table 37. Address: 0x22
TYPE
R/W
DEFAULT DESCRIPTION
109 The digital playback engine uses this value to automatically determine the appropriate feedback
gain for closed-loop operation.
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