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DRV8889-Q1 Datasheet(PDF) 46 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) 46 Page - Texas Instruments

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7.6.1 Status Registers
The status registers are used to reporting warning and fault conditions. Status registers are read-only registers
Table 7-19 lists the memory-mapped registers for the status registers. All register offset addresses not listed in
Table 7-19 should be considered as reserved locations and the register contents should not be modified.
Table 7-19. Status Registers Summary Table
Address
Register Name
Section
0x00
FAULT status
Go
0x01
DIAG status 1
Go
0x02
DIAG status 2
Go
7.6.2 FAULT Status Register Name (address = 0x00)
FAULT status is shown in Figure 7-33 and described in Figure 7-33.
Read-only
Figure 7-33. FAULT Status Register
7
6
5
4
3
2
1
0
FAULT
SPI_ERROR
UVLO
CPUV
OCP
STL
TF
OL
R-0b
R-0b
R-0b
R-0b
R-0b
R-0b
R-0b
R-0b
Table 7-20. FAULT Status Register Field Descriptions
Bit
Field
Type
Default
Description
7
FAULT
R
0b
When nFAULT pin is at 1, FAULT bit is 0. When nFAULT pin is at
0, FAULT bit is 1.
6
SPI_ERROR
R
0b
Indicates SPI protocol errors, such as more SCLK pulses than
are required or SCLK is absent even though nSCS is low.
Becomes high in fault and the nFAULT pin is driven low. Normal
operation resumes when the protocol error is removed and a
clear faults command has been issued either through the
CLR_FLT bit or an nSLEEP reset pulse.
5
UVLO
R
0b
Indicates an undervoltage lockout fault condition.
4
CPUV
R
0b
Indicates charge pump undervoltage fault condition.
3
OCP
R
0b
Indicates overcurrent fault condition
2
STL
R
0b
Indicates motor stall condition.
1
TF
R
0b
Logic OR of the overtemperature warning, undertemperature
warning and overtemperature shutdown.
0
OL
R
0b
Indicates open-load condition.
7.6.3 DIAG Status 1 (address = 0x01)
DIAG Status 1 is shown in Figure 7-34 and described in Table 7-21.
Read-only
Figure 7-34. DIAG Status 1 Register
7
6
5
4
3
2
1
0
OCP_LS2_B
OCP_HS2_B
OCP_LS1_B
OCP_HS1_B
OCP_LS2_A
OCP_HS2_A
OCP_LS1_A
OCP_HS1_A
R-0b
R-0b
R-0b
R-0b
R-0b
R-0b
R-0b
R-0b
DRV8889-Q1
SLVSEE9C – APRIL 2020 – REVISED AUGUST 2020
www.ti.com
46
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Copyright © 2020 Texas Instruments Incorporated
Product Folder Links: DRV8889-Q1


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