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US 2011/0219257 A1Published application
Idle-state detection circuit, semiconductor integrated circuit, and idle-state detection method
AssigneePanasonic Corporation
InventorGenichiro MATSUDA
Life of this patent
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Abstract
An idle-state detection circuit detects that the processor repeats every predetermined number of clocks an operation to load data satisfying a preset idle-state condition from a particular address, and determines that the processor is in an idle state if the number of iterations is greater than a preset specified number of loops.
Claims12
An idle-state detection circuit for detecting an idle state of a processor, comprising:
- an iterative-operation detection section configured to detect that the processor repeats every predetermined number of clocks an operation to load data satisfying a preset idle-state condition from a particular address;
- and
- a decision section configured to compare a number of iterations detected by the iterative-operation detection section with a preset specified number of loops, and to determine that the processor is in an idle state if the number of iterations is greater than the specified number of loops.
An idle-state detection method for detecting an idle state of a processor, comprising the steps of:
- (a) detecting that the processor repeats every predetermined number of clocks an operation to load data satisfying a preset idle-state condition from a particular address;
- and
- (b) determining that the processor is in an idle state if a number of iterations detected in the step (a) is greater than a preset specified number of loops.
Dependencies are inferred from the claim text.