25.2.4.2 Asynchronous Steering Mode
In Asynchronous mode (MODE = 000), steering takes effect at the end of the
         instruction cycle that writes to STRx. In Asynchronous Steering mode, the output signal may
         be an incomplete waveform (see the figure below). This operation may be useful when the
         user firmware needs to immediately remove a signal from the output pin.
000)