Method for controlling refresh of a multibank memory device
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United States of America Patent
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Jul 1, 2003
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N/A
app pub date -
Nov 19, 1998
filing date -
Nov 19, 1998
priority date (Note) -
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Abstract
A method is described for controlling refresh of a multibank DRAM. A refresh request and associated address are generated external to the DRAM. DRAM refresh operations are initiated in one bank while data transfer operations are being executed in another bank. The refresh request is handled much like a memory read request, with the associated read data being ignored. In one implementation, the refresh request is given priority over any other pending memory access request. By initiating refresh operations without first waiting for all DRAM banks to be precharged, the significant time penalties associated with the prior art are avoided.
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