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DRV8889-Q1 Datasheet(PDF) 51 Page - Texas Instruments

Part No. DRV8889-Q1
Description  DRV8889-Q1, DRV8889A-Q1 Automotive Stepper Driver with Integrated Current Sense, 1/256 Micro-Stepping, and Stall Detection
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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DRV8889-Q1 Datasheet(HTML) 51 Page - Texas Instruments

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Table 7-27. CTRL4 Control Register Field Descriptions (continued)
Bit
Field
Type
Default
Description
0
TW_REP
R/W
0b
0b = Overtemperature or undertemperature warning is not
reported on the nFAULT line
1b = Overtemperature or undertemperature warning is reported
on the nFAULT line
7.6.10 CTRL5 Control Register (address = 0x07)
CTRL5 for DRV8889A-Q1 is shown in Figure 7-41 and described in Table 7-28.
CTRL5 for DRV8889-Q1 is shown in Figure 7-42 and described in Table 7-29.
DRV8889A-Q1 features programable open-load detection time using the OL_TIME [1:0] bits and programmable
slow-decay to drive blanking time using the EN_SR_BLANK bit.
Read/Write
Figure 7-41. CTRL5 Control Register for DRV8889A-Q1
7
6
5
4
3
2
1
0
RSVD
STL_LRN
EN_STL
STL_REP
OL_TIME [1:0]
EN_SR_BLANK
R/W-00b
R/W-0b
R/W-0b
R/W-1b
R/W-00b
R/W-0b
Figure 7-42. CTRL5 Control Register for DRV8889-Q1
7
6
5
4
3
2
1
0
RSVD
STL_LRN
EN_STL
STL_REP
RSVD
R/W-00b
R/W-0b
R/W-0b
R/W-1b
R/W-000b
Table 7-28. CTRL5 Control Register Field Descriptions for DRV8889A-Q1
Bit
Field
Type
Default
Description
7-6
RSVD
R/W
00b
Reserved. Should always be '00'.
5
STL_LRN
R/W
0b
Write '1' to learn stall count for stall detection. This bit
automatically returns to '0' when the stall learning process is
complete.
4
EN_STL
R/W
0b
0b = Stall detection is disabled
1b = Stall detection is enabled
3
STL_REP
R/W
1b
0b = Stall detection is not reported on nFAULT
1b = Stall detection is reported on nFAULT
2-1
OL_TIME [1:0]
R/W
00b
00b = 200ms (max.) open load detection time
01b = 125ms (max.) open load detection time
10b = 75ms (max.) open load detection time
11b = 3ms (max.) open load detection time
0
EN_SR_BLANK
R/W
0b
0b = 500ns slow-decay to drive blanking time
1b = slow-decay to drive blanking will depend on slew rate,
shown in Table 7-9.
Table 7-29. CTRL5 Control Register Field Descriptions for DRV8889-Q1
Bit
Field
Type
Default
Description
7-6
RSVD
R/W
00b
Reserved. Should always be '00'.
www.ti.com
DRV8889-Q1
SLVSEE9C – APRIL 2020 – REVISED AUGUST 2020
Copyright © 2020 Texas Instruments Incorporated
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Product Folder Links: DRV8889-Q1


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