Timer unit and data processing apparatus including the same

摘要

A micro computer has a free-running counter, a first capture register served with counted data from the free-running counter, and a second capture register which is selectively served with the data held in the first capture register or the counted data from the free-running counter. The second capture register works as a save register for the first capture register. This makes it possible to increase the precision of the timer unit in the micro computer, enabling the timer unit to find general applicability more extensively.