Start-up circuit and start-up method

Abstract

A start-up circuit receives a start-up signal instructing start-up of an equipment mounted with the circuit, and executes a predetermined sequence when start-up is instructed by the start-up signal. An oscillator generates a clock signal. A sequence circuit receives the start-up signal and a clock signal output from the oscillator, measures time by counting the clock signal when the start-up signal transits to a predetermined level, and executes a predetermined event at a predetermined timing. The oscillator operates for a period where the start-up signal is at the predetermined level if the start-up signal is at the predetermined level during the period the power key of the equipment mounted with the circuit is being pushed.

1 - 6 . (canceled) 
     
     
         7 . A start-up method of monitoring a start-up signal, and executing a predetermined sequence when start-up is instructed, the method comprising:
 starting up an oscillator when the start-up signal transits to a predetermined level for instructing start-up of an equipment;   executing a predetermined event at a predetermined timing by counting a clock signal generated by the oscillator; and   stopping the oscillator when the start-up signal transits to a level different from the predetermined level, wherein   the start-up signal is at the predetermined level while a power key of the equipment mounted with the circuit is being pushed.   
     
     
         8 . The start-up method according to  claim 7 , further comprising stopping the operation of the oscillator after a predetermined time-out period has elapsed by counting the clock generated by the oscillator.