[intellec7]

Actually, there are some applications that switching between full-forward and full-reverse (Locked-Anti phase) are more advantageous than full-forward/reverse and float/brake (Signed-Magnitude). It normally offers more linearity in motor RPM vs Duty Cycle. This is probably because the motor coasts for different periods of time depending on the shaft's velocity prior to turning off power to the motor and this relation is not linear.