Special mode control method for dynamic random access memory
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United States of America Patent
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Apr 25, 1995
Grant Date -
N/A
app pub date -
Nov 16, 1992
filing date -
Nov 15, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A dynamic RAM provided with a data retention mode intended for low power consumption is provided. In the data retention mode, the current supply capabilities of voltage generation circuits which generate decreased voltage, increased voltage, reference voltage, etc., are limited in the range in which information retention operation in memory cells can be maintained, and the number of selected memory mats in the data retention mode is increased with respect to that of memory mats selected in the normal read/write mode and refresh mode. Special modes such as the data retention mode are set by combining an address strobe signal and other control signals and dummy CBR refresh is executed to release the special mode.
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