Memory controller with transaction-queue-dependent power modes
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United States of America Patent
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Jan 5, 2016
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N/A
app pub date -
Apr 23, 2015
filing date -
Jan 12, 2009
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Abstract
A memory controller component of a memory system stores memory access requests within a transaction queue until serviced so that, over time, the transaction queue alternates between occupied and empty states. The memory controller transitions the memory system to a low power mode in response to detecting the transaction queue is has remained in the empty state for a predetermined time. In the transition to the low power mode, the memory controller disables oscillation of one or more timing signals required to time data signaling operations within synchronous communication circuits of one or more attached memory devices and also disables one or more power consuming circuits within the synchronous communication circuits of the one or more memory devices.
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