Patent ID: 8552806
Filing Date: 2013-10-08
Classification: G06F

Abstract:
1. A clock supply apparatus, comprising: a frequency generation unit, deciding amplitude of a clock signal to be a first amplitude or a second amplitude in response to a mode signal, and converting an external oscillation signal into the clock signal, wherein the first amplitude is greater than the second amplitude; a control unit, coupled to the frequency generation unit and receiving the clock signal, outputting the mode signal in response to a system status signal, and supplying the clock signal to external when determining that the clock signal has a stable oscillation; and a counter, coupled to an output of the control unit, and counting the clock signal to generate a date code, wherein when the system status signal is a power on signal, the first amplitude is used as the amplitude of the clock signal, and when the system status signal is a power off signal, the second amplitude is used as the amplitude of the clock signal.