A reverse torque, forward commutation motor driver system for a phased
motor rapidly decelerates or "brakes" the motor by exciting, in sequence,
a complementary excitation signal in each normal commutation state of the
forward state machine, thereby providing an active braking effect. After
active braking reduces the rotational velocity of the motor below a
threshold, a dynamic braking technique can replace the active braking,
wherein high-side drivers are set to an opposite voltage as compared to
low-side drivers.