Patent ID: 8656197
Filing Date: 2014-02-18
Classification: H03L

Abstract:
1. A semiconductor device, comprising: an oscillation unit that supplies an oscillated clock to a circuit included in the semiconductor device; a frequency setting information storage unit that stores a plurality of sets of frequency information indicating setting of a frequency supplied by the oscillation unit and frequency identification information identifying the frequency information and outputs one of a plurality of pieces of the frequency information to the oscillation unit based on frequency identification information inputted thereinto; a speed setting information storage unit that stores speed identification information indicating a speed of the semiconductor device and frequency identification information corresponding to the speed identification information; a frequency identification information count unit that holds a value of the frequency identification information inputted into the frequency setting information storage unit; and a control unit that causes the frequency identification information count unit to increment or decrement the held value of the frequency identification information to approach a value of the frequency identification information stored in the speed setting information storage unit.