Datasheet

Section 5 Clock Pulse Generators
Rev. 3.00 Sep. 14, 2006 Page 70 of 408
REJ09B0105-0300
5.1 Features
• Choice of two clock sources
On-chip oscillator clock
External oscillator clock
• Choice of two types of on-chip oscillation frequency by the user software
8MHz
10MHz
• Frequency trimming
Users can adjust the on-chip oscillation frequency by rewriting the trimming registers.
• Interrupt can be requested to the CPU when the system clock is changed from the external
clock to the on-chip oscillator clock.