Predictive temperature compensation for memory devices systems and method
AssigneePalm, Inc.
InventorNeal A. Osborn
Life of this patent
Estimating the term…
Abstract
A mobile electronic device is disclosed. The mobile electronic device includes a housing, a processor supported by the housing, and a memory device coupled to the processor, the memory device including an adjustable self-refresh rate setting configured to determine the self-refresh rate of the memory device. The mobile electronic device also includes a temperature sensor supported by the housing, the temperature sensor is coupled to the processor and configured to measure a temperature. The mobile electronic device also includes computer program logic running on the processor, and the computer program logic is configured to predict a future temperature and change the adjustable self-refresh rate setting based on the predicted future temperature.
Claims26
A mobile electronic device, comprising:
- a housing;
- a processor supported by the housing;
- a memory device coupled to the processor, the memory device including an adjustable self-refresh rate setting configured to determine the self-refresh rate of the memory device;
- a temperature sensor supported by the housing, coupled to the processor and configured to measure a temperature;
- and
- computer program logic running on the processor, and configured to predict a future temperature and change the adjustable self-refresh rate based on the predicted future temperature.
A method of changing the self-refresh rate for a memory circuit having an adjustable refresh rate, comprising:
- defining a temperature compensated self-refresh rate (TCSR) value;
- measuring a temperature associated with the temperature of the memory circuit;
- providing a new TCSR value if the temperature is greater than the current TCSR value;
- storing the current temperature reading with at least one other previous temperature reading;
- calculating a predicted temperature reading based on the current temperature and the at least one other previous temperature reading;
- and
- providing a new TCSR value if the predicted temperature is greater than the current TCSR value.
A handheld computer, comprising:
- a housing;
- a display supported by the housing;
- a processor supported by the housing and coupled to the display;
- low power synchronous dynamic random access memory (LPDRAM) coupled to the processor, the LPDRAM including a temperature compensated self-refresh rate (TCSR) setting configured to determine the self-refresh rate of the LPDRAM;
- a temperature sensor supported by the housing, coupled to the processor and configured to measure a temperature;
- and
- computer program logic running on the processor, and configured to predict a future temperature and change the TCSR based on the predicted future temperature.
Dependencies are inferred from the claim text.