Texas Instruments DRV8317HEVM, User Manual, Page: 11 / 29

Table 4-3. Description of Hardware settings for DRV8317H (continued)
Setting Jumper Position Description
GAIN J8 = Top 2 V/A
J8 = No Jumper 1 V/A
J8 = Middle 0. 5 V/A
J8 = Bottom 0.25 V/A
4.4.2 DRV8317S Compatibility
The DRV8317HEVM is compatible with the DRV8317S (SPI variant) to spin a 3-phase Brushless-DC motor. The
DRV8317S replaces the hardware settings (MODE, SLEW, and GAIN) with 4 SPI signals: SDI, SDO, SCLK, and
nSCS.
When using the DRV8317S, the DRV8317S variant IC needs to be soldered onto U1 in place of the DRV8317H,
and resistors R9, R10, R11, and R12 must be populated with 0-ohm resistors. Additionally, the jumpers must be
removed from J8, J9, and J10. This properly connects the SPI signals to the correct pins on the device.
4.4.3 MCU Power Options
The DRV8317HEVM has several options for powering the LAUNCHXL-F280049C or an external MCU. Table 4-4
provides a description of the various MCU power options.
Table 4-4. MCU power options
LAUNCHXL-F280049C connections DRV8317HEVM connections Result
JP1, JP2, and JP3 are populated R13 and R7 are populated F280049C MCU is powered both from the
USB of the LaunchPad and the 3V3 rail of
the EVM’s buck regulator.
JP1, JP2, and JP3 are populated R13 is populated, R7 is not populated, no
external 3V3 supplied to EVM MCU is powered from the USB of the
LaunchPad, and the LaunchPad will supply
3V3 to the EVM.
JP1, JP2, and JP3 are populated R13 is populated, R7 is not populated,
external 3V3 supplied to EVM through the
3V3 test point MCU is powered both from the USB of
the LaunchPad and from the external 3V3
supplied to the EVM
JP1, JP2, and JP3 are populated R13 is not populated MCU is powered from USB power supply
JP3 is populated, JP1 and JP2 are not
populated R13 and R7 are populated MCU is powered completely from the 3V3 of
the buck of the EVM
JP3 is populated, JP1 and JP2 are not
populated R13 is populated, R7 is not populated,
external 3V3 supplied to EVM through the
3V3 test point MCU is powered completely from the external
3V3 supplied to the EVM
4.4.4 Interfacing DRV8317HEVM and LAUNCHXL-F280049C LaunchPad
The DRV8317HEVM has 40 pins with different functions. These pins are interfaced with the
LAUNCHXLF280049C LaunchPad development kit and are mapped appropriately to receive the functionalities
of the DRV8317H device. These 40 pins are grouped into 4 ports in respect to the LAUNCHXL-F280049C (J1 to
J4).
Table 4-5 and Table 4-6 list the interfacing of these ports of the DRV8317HEVM headers J3 and J4.
Table 4-5. Connections for Header J3 on DRV8317HEVM (DNP in bold)
J3 Pin Number DRV8317HEVM Function LAUNCHXL-F280049C Function Description
1 3V3 +3.3 V 3.3 V LaunchPad Supply
2 5 V supply +5 V 5 V Boost from LaunchPad
3 Not used PGA1/3/5_GND Not used
4 AGND GND GND connection
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