DRV10987 EVM Board
5
SLOU476 – August 2017
Copyright © 2017, Texas Instruments Incorporated
DRV10987 Evaluation Module User's Guide
3.4
Jumper J1 (Direction)
To control the spin direction of the motor, the DRV10987 EVM is equipped with a direction jumper.
Depending if 3V3 or GND is supplied to the DRV10987 direction input, the motor spins either in forward or
reverse direction.
Table 4. DIR PIN Setting
J1 Connection
Description
Unconnected
DIR is set to 3.3 V
Connected
DIR is set to GND (shown)
3.5
Jumper J2 (Speed Input)
The motor speed input source is configured with J2. If J2 pins 2-3 is populated, supply a PWM to the
PWMIN test pin to control the motor speed. If J2 pins 1-2 is populated, the motor speed is controlled with
the analog potentiometer R2 equipped on the EVM.
Table 5. SPEED Pin Setting
J2 Connection
Description
1-2
Analog Pot R2 (shown)
2-3
PWMIN digital input
NOTE:
The motor operation can be unpredictable if the internal register setting the DRV10987
device does not match the J2 selection.
3.6
FG Test Pin
The frequency generator (FG) test pin outputs the motor speed, depending on the internal DRV10987
divider setting and the number of motor poles.
