Method for adaptive control of DRAM refresh interval
First Claim
1. A method of determining an appropriate refresh interval for a DRAM chip, the method comprising:
- detecting device startup;
providing a clock pulse as a refresh interval;
self-testing a plurality of memory cells using the refresh interval;
modifying the refresh interval and repeating the above steps;
determining the longest refresh interval as a result of the self-testing procedure; and
using the appropriate refresh interval, defined by the longest refresh interval, to refresh the DRAM.
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Abstract
The present invention relates to a method for finding the appropriate refresh interval applied for DRAM of the present invent, comprising, detecting startup, providing a clock pulse as a refresh interval, DRAM self-testing of a plurality of memory cells with the provided refresh interval, modifying the refresh interval and repeating the above steps to find the longest refresh interval as determined by the DRAM self-testing procedure, and using the determined appropriate refresh interval to refresh the DRAM. Therefore, the appropriate refresh interval, found form the method of the present invention, could be adjusted with the DRAM chip for saving the power with refresh.
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3 Claims
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1. A method of determining an appropriate refresh interval for a DRAM chip, the method comprising:
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detecting device startup;
providing a clock pulse as a refresh interval;
self-testing a plurality of memory cells using the refresh interval;
modifying the refresh interval and repeating the above steps;
determining the longest refresh interval as a result of the self-testing procedure; and
using the appropriate refresh interval, defined by the longest refresh interval, to refresh the DRAM. - View Dependent Claims (2, 3)
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Specification