UM0289 PC software
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Figure 8. 6235 window
The Connector Selection panel shows the connector of the MDK-ST10 with which the
EVAL6235 can be connected (some connector selections could be disabled if the connector
is used by other windows). The left part of this window allows the user to control a BLDC
motor in open loop mode. The right part of the window allows the user to perform a PID
speed closed loop control with encoder feedback.
The Motor Control Command panel is always enabled, while the Control Parameters and
Control Loop Time panels are disabled when the Closed Loop check button is not checked.
In each case the Get button is always enabled.
Motor Control Command panel:
● Enable: Enables the 6235 driver. This command switches ON all Power MOSFETs of
the driver (pin EN high).
● Disable: Disables the 6235 driver. This command switches OFF all Power MOSFETs of
the driver (pin EN low).
● Unbrake: Sets the pin BRAKE high of the 6235 and enables the normal mode (six step
control strategy).
● Brake: Sets the pin BRAKE low of the 6235. This command switches ON all High Side
Power MOSFETs, implementing the Brake Function.
● Duty Cycle Set: This slider allows the user to set the duty cycle of the PWM generated
by the ST10 as input for the FWD/REV pin of the 6235 driver. Values between 0 and
50% cause the rotation of the motor in one direction, while values between 50% and
100% cause the rotation of the motor in the other direction. A 50% value corresponds
to no motor rotation.
Note: The real direction (clockwise or counterclockwise) depends on the connection between the
6235 and the motor.
● PWM set: This slider allows the user to change the frequency of the PWM generated by
the ST10. The allowed values go from a minimum of 17 kHz to a maximum of 30 kHz.
(with 1 kHz steps)
Note: At system startup the default values are: disable, brake, PWM duty cycle 50%, PWM
frequency 17 kHz.
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