A real-time processor includes a clock register updating a time at a
predetermined interval, a time register storing an arbitrary time, a time
comparator comparing the time in the clock register with the time stored
in the time register, and an instruction processing unit executing an
instruction whose execution status is altered according to the comparison
result of the time comparator. A predetermined operation can be carried
out correctly at a predetermined time since the instruction processing
unit executes an instruction whose execution status is altered according
to the comparison result of the time comparator.