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摘要

A remote unit operable in an idle mode to alternately wake-up and to enter a sleep mode, said remote unit comprising: a processing unit for controlling said remote unit; a clock signal generation system for generating system timing signals input to said processing unit, said clock signal generation system including: a first clock pulse generating unit for generating first clock pulses; a first counter for counting said first clock pulses and outputting a first system timing signal when a counted number of said first clock pulses exceeds a first predetermined threshold; a second clock pulse generating unit for generating second clock pulses; a second counter for holding a number of second clock pulses counted between the first system timing signals of said first counter and for counting said second clock pulses and outputting a second system timing signal when a counted number of said second clock pulses exceeds the held number of second clock pulses; and a mechanism for receiving said first and second system timing signals from said first and second counters and outputting said first system timing signal to said processing unit from said first counter when said processing unit is to wake-up and outputting said second system timing signal from said second counter when said processing unit is in sleep mode.