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US 6,148,392 AGranted
Low power implementation of an asynchronous stock having a constant response time
AssigneesHyundai Electronics Industries Co., Ltd., Cogency Technology Incorporated
InventorJianwei Liu
Life of this patent
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Abstract
An asynchronous stack apparatus and method is provided that reduces power consumption that maintains a constant response time regardless of the number of stored items. The asynchronous stack apparatus uses a token and control circuits to indicate a current tope of stack and process data input/output. The asynchronous stack apparatus includes a communication device, a plurality of storage units and a token control circuit.
Claims20
An asynchronous stack, comprising:
- a communication device;
- a plurality of data storage units coupled to the communication device;
- and
- a token control circuit, wherein the token control circuit comprises,
- a plurality of token control units, wherein each of the token control units correspond to one of the data storage units, and
- a local control circuit coupling the plurality of token control units to determine capacity of the asynchronous stack, and wherein the token control circuit controls a data access operation for the asynchronous stack in response to a received instruction.
3 more elements
A method of operating an asynchronous stack having a plurality of intercoupled storage units, the method comprising:
- receiving a first control signal;
- selecting one of a plurality of token control units that contains a token and generating a second signal responsive to the first control signal;
- processing data for a corresponding one of the storage units based on the second signal from the selected token control unit, wherein the processing data step comprises,
- performing one of storing data and retrieving data to the corresponding storage unit, and
- locally modifying a capacity of the asynchronous stack in response to the performing step, wherein the processing data step has a constant response time independent of an amount of data stored in the stack.
2 more elements
Dependencies are inferred from the claim text.