26.2.4.2 Asynchronous Steering Mode
In Asynchronous mode (MODE =
                ‘b000), 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.
‘b000)