DirA:        0*L->H,        0*H->L
    DirB:        1*L->H,        0*H->L
 EnableA:        0*L->H,        0*H->L
 EnableB:        0*L->H,        0*H->L
   StepA:        0*L->H,        0*H->L, Max High=0us Total High=0us
   StepB:        2*L->H,        2*H->L, Max High=12us Total High=16us
Position[B]=2

Time in StepB  max=12 us, total=16 us