Patent ID: 7356719
Filing Date: 2008-04-08
Classification: G06F

Abstract:
1. A microcomputer comprising: a CR oscillating circuit; a processing circuit for managing a time required to execute predetermined processing based upon an oscillation signal output from the CR oscillating circuit for fixing the time; a temperature detecting unit for detecting the temperature of a periphery of the CR oscillating circuit; a storage unit in which data is stored, the data for determining a control value based upon an oscillation output characteristic of the CR oscillating circuit that varies in accordance with temperature, the control value being used so that the processing time managed by the processing circuit is fixed; and a control circuit for reading out the data stored in the storage unit in accordance with temperature detected by the temperature detecting unit, determines the control value and sets the control value in the processing circuit, wherein the processing circuit executes communication processing, and the control value is a communication rate in the communication processing.