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User Interface
11
SLVUB95C – December 2017 – Revised August 2018
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DRV10974 Evaluation Module
Figure 11. Speed Command Input Select Header (J3)
•
Select
(J3) is used to configure motor speed-control resources for the PWM pin. Set the PWM jumper
to
PWMIN
for sending a PWM signal to the PWM pin to control motor speed. See
Figure 4
for more
details. Set the PWM jumper to
Analog
with J2 connected for using potentiometer (R5) to control motor
speed. See
Figure 3
for more details.
•
J7 and J11 Connections
are placeholders for an I
2
C interface, so they can be ignored.
Figure 12. Potentiometer Power Header (J2)
•
Potentiometer Power
(J2) provides voltage from the V1P8 pin of the DRV10974 device to power the
potentiometer. This header must be jumpered to use the potentiometer.
6.2
Switch
The
S1
switch allows the applied power supply voltage to reach the rest of the board. A fuse is used to
protect the device from overcurrent. Turn the switch to the On position to power the EVM.
6.3
Test Points
Test points are provided and labeled according to the inputs and outputs of the DRV10974 motor driver
(see
Table 4
).
Table 4. Test Point Descriptions
TEST POINT
NAME
DESCRIPTION
TP1
Power In
Used to power board in conjunction with
the switch (S1)
TP2
VCC
Used to power board and bypass the
switch (S1)
TP3
U Phase
Input for 1 of the 3 motor phase
windings of the BLDC motor
TP4
V Phase
Input for 1 of the 3 motor phase
windings of the BLDC motor
TP5
W Phase
Input for 1 of the 3 motor phase
windings of the BLDC motor
