Clock control and power management for semiconductor apparatus and system
First Claim
Patent Images
1. A semiconductor apparatus comprising;
- a circuit including a predetermined function;
a clock generating circuit that generates a clock signal supplied to the circuit;
a clock control circuit that outputs;
a plurality of control signals to the clock generating circuit,a first signal that indicates when a frequency of the clock signal is being changed from a predetermined frequency to a higher frequency, anda second signal that indicates when the clock signal is being supplied to the circuit; and
a notification signal generating circuit, coupled to the clock control circuit, that generates a notification signal for notifying a power supply apparatus when the clock signal frequency is being changed based on the first signal, and when the clock signal is being supplied to the circuit based on the second signal.
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Abstract
A semiconductor apparatus according to the present invention includes a circuit including a predetermined function, a clock generating circuit that generates a clock signal supplied to the circuit, a clock control circuit that controls the clock generating circuit, and a notification signal generating circuit that generates a notification signal for notifying a timing for the clock control circuit to control the clock generating circuit. A voltage supplied to the semiconductor apparatus is adjusted according to the notification signal.
21 Citations
22 Claims
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1. A semiconductor apparatus comprising;
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a circuit including a predetermined function; a clock generating circuit that generates a clock signal supplied to the circuit; a clock control circuit that outputs; a plurality of control signals to the clock generating circuit, a first signal that indicates when a frequency of the clock signal is being changed from a predetermined frequency to a higher frequency, and a second signal that indicates when the clock signal is being supplied to the circuit; and a notification signal generating circuit, coupled to the clock control circuit, that generates a notification signal for notifying a power supply apparatus when the clock signal frequency is being changed based on the first signal, and when the clock signal is being supplied to the circuit based on the second signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A semiconductor apparatus comprising:
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a circuit including a predetermined function; a power control circuit that outputs; a power control signal to the circuit, and a signal that indicates when the power control signal is being supplied to the circuit; and a notification signal generating circuit, coupled to the power control circuit, that generates a notification signal for notifying a power supply apparatus when the power control signal is being supplied to the circuit based on the signal. - View Dependent Claims (17, 18, 19, 20)
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21. A system comprising:
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a semiconductor apparatus comprising; a circuit including a predetermined function; a clock generating circuit that generates a clock signal supplied to the circuit; a clock control circuit that controls the clock generating circuit and outputs; a plurality of clock control signals to the clock generating circuit, a first signal that indicates when a frequency of the clock signal is being changed from a predetermined frequency to a higher frequency, and a second signal that indicates when the clock signal is being supplied to the circuit; a power control circuit that outputs; a power control signal to the circuit, and a third signal that indicates when the power control signal is being supplied to the circuit; and a notification signal generating circuit, coupled to the clock control circuit and the power control circuit, that generates a notification signal for notifying when the clock signal frequency is being changed based on the first signal, when the clock signal is being supplied to the circuit based on the second signal, and when the power control signal is being supplied to the circuit based on the third signal; and an output terminal, coupled to the notification signal generating circuit, for providing the notification signal; and a power supply apparatus, including an input terminal coupled to the output terminal, that supplies power to the semiconductor apparatus based on the notification signal. - View Dependent Claims (22)
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Specification