Patent ID: 6064252
Filing Date: 2000-05-16
Classification: G06F

Abstract:
A clock supply apparatus, comprising:low-rate source clock generating means for generating a low-rate source clock signal having a frequency lower than a predetermined value;frequency conversion means for performing at least one of frequency multiplication and frequency division of said low-rate source clock signal only during a period in which a sleep signal remains nonactive, to thereby generate a high-rate clock signal for signal processing, said high-rate clock signal having a frequency higher than said predetermined value;sleep time measuring means for performing time measurement with said low-rate source clock signal from the moment when said sleep signal becomes active and issuing a sleep end signal upon measurement of a predetermined time period; andsleep control means for changing over said sleep signal between an active state and a nonactive state to provide a sleep mode or a non-sleep mode, said sleep control means controlling the end of the sleep mode in response to said sleep end signal.