Digital system clock control
First Claim
1. A digital system comprising at least:
- a main processor unit;
a system oscillator for providing a system clock;
one or more functional blocks, whereof at least one is configured to detect a need for a system clock; and
a power management control block separate from the main processor unit and configured to control the system oscillator in order to provide the system clock in response to receiving a system clock request from at least one said functional blocks, said functional block being capable of waking up by itself and configured to send at least one system clock request signal to the control block to request the system clock.
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Accused Products
Abstract
A digital system, a method implemented by the system and a mobile device, in which the system can be applied, the system including a system oscillator for providing a system main clock signal, a control block for controlling at least the power management of the digital system and one or more functional blocks, whereof at least one is arranged to detect a need for a system clock. At least one functional block is arranged to send at least one system clock request signal to the control block, which in turn is arranged to enable the system oscillator to provide the system clock signal in response to receiving the system clock request signal. When the system clock signal appears, the at least one functional block is arranged to detect the system clock signal.
23 Citations
26 Claims
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1. A digital system comprising at least:
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a main processor unit;
a system oscillator for providing a system clock;
one or more functional blocks, whereof at least one is configured to detect a need for a system clock; and
a power management control block separate from the main processor unit and configured to control the system oscillator in order to provide the system clock in response to receiving a system clock request from at least one said functional blocks, said functional block being capable of waking up by itself and configured to send at least one system clock request signal to the control block to request the system clock. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method in a digital system said system comprising at least:
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a main processor unit;
a system oscillator for providing a system clock;
one or more functional blocks, whereof at least one is configured to detect a need for a system clock; and
a power management control block separate from the main processor unit and the method comprising;
controlling the system oscillator in order to provide the system clock in response to receiving a system clock request from at least one said functional blocks, said functional block being capable of waking up by itself and configured to send at least one system clock request signal to the control block to request the system clock. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A mobile device comprising a digital system having at least:
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a main processor unit;
a system oscillator for providing a system clock;
one or more functional blocks, whereof at least one is configured to detect a need for a system clock; and
a power management control block separate from the main processor unit and configured to control the system oscillator in order to provide the system clock in response to receiving a system clock request from at least one said functional blocks, said functional block being capable of waking up by itself and configured to send at least one system clock request signal to the control block to request the system clock. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification