SYSTEM CLOCK SWITCHING MECHANISM FOR MICROPROCESSOR

摘要

This system clock switching mechanism for a microprocessor has system clock specification data for the tasks in holding means such as a task control block (TDB). If there is no task in READY or RUN status, the clock switching control unit switches the system clock to the low speed clock. When the task is put in RUN status, the system clock specification data for that task in TDB is referred to so that the system clock is switched to the clock as specified.