+ #
+ # When no falling edge is seen within the maximum tolerance
+ # for the last DATA bit, then this could be the combination
+ # of a HIGH DATA bit and a PAD bit without a LOW in between.
+ # Fake an edge in that case, to re-use existing code paths.
+ # Make sure to keep referencing times to the last SYNC pad's
+ # falling edge. This is the last reliable condition we have.