Efficient PCMS refresh mechanism
First Claim
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1. An apparatus, comprising:
- invert determination logic circuitry to determine if a read data path that transports data read from a memory device is to be inverted or not inverted as a function of whether information represented by said data was last written in an inverted or non inverted logical state to said memory device during a refresh of said memory device, said memory device comprising vertically stacked storage cell arrays.
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Abstract
An apparatus is described having invert determination logic circuitry to determine if a read data path that transports data read from a PCMS memory device is to be inverted or not inverted as a function of whether information represented by the data was last written in an inverted or non inverted logical state to the PCMS memory device during a refresh of said PCMS memory device.
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Citations
22 Claims
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1. An apparatus, comprising:
invert determination logic circuitry to determine if a read data path that transports data read from a memory device is to be inverted or not inverted as a function of whether information represented by said data was last written in an inverted or non inverted logical state to said memory device during a refresh of said memory device, said memory device comprising vertically stacked storage cell arrays. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method, comprising:
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reading data from a memory device, the memory device comprising vertically stacked storage cell arrays; inverting said data to form inverted data; writing said inverted data into said memory device at a same address that said data was read from; and
,recording invert/non-invert information that indicates whether said inverted data represents an inverted form or non inverted form of information stored at said same address. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A computing system, comprising:
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a near memory composed of a DRAM device; a far memory composed of a memory device, the memory device comprising vertically stacked storage cell arrays; an NVRAM controller coupled to said memory device, said NVRAM controller comprising invert determination logic circuitry to determine if a read data path that transports data read from said memory device is to be inverted or not inverted as a function of whether information represented by the data was last written in an inverted or non inverted logical state to said memory device during a refresh of said memory device. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification