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US 12,645,388 B2Granted
Efficient memory operation using a destructive read memory array
AssigneeAdvanced Micro Devices, Inc.
InventorsJagadish B. Kotra, Divya Madapusi Srinivas Prasad
Life of this patent
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Abstract
A system may include a memory configured to store data of a first logic state in a ferroelectric capacitor when an electric polarization of the ferroelectric capacitor is in a first direction. A system may include a controller configured to erase the data from the memory by commanding the electric polarization of the ferroelectric capacitor in a second direction, opposite of the first direction and skipping a subsequent write operation of a null value to the memory.
Claims20
A system comprising:
- a memory configured to store data of a first logic state in a ferroelectric capacitor when an electric polarization of the ferroelectric capacitor is in a first direction;
- a data bus;
- and
- a controller communicatively coupled to the memory by the data bus and configured to:
- operate the data bus in a read-mode of operation;
- while operating the data bus in the read-mode of operation, erase the data from the memory by:
- commanding the electric polarization of the ferroelectric capacitor in a second direction, opposite to the first direction;
- and
- skipping a subsequent write operation of a null value to the memory;
- and
- maintain the data bus in the read-mode of operation for one or more read requests until a write request is received.
8 more elements
A system comprising:
- a capacitor configured to be in one of a set state where the capacitor stores data and a reset state where the capacitor stores a null value based on a polarization direction of a ferroelectric layer of the capacitor;
- a data bus;
- and
- a controller communicatively coupled to the data bus and configured to perform operations comprising:
- receiving a request to erase the data from the capacitor while the capacitor is in the set state;
- and
- in response to receiving the request:
- operating the data bus in a read-mode of operation;
- causing a reversal of the polarization direction to transition the capacitor to the reset state without performing a write operation of the null value to the capacitor;
- and
- continuing to operate the data bus in the read-mode of operation after transitioning the capacitor to the reset state until a write request is received.
8 more elements
A method comprising:
- receiving, at a controller, a request to erase data at a memory location that stores the data using a ferroelectric capacitor;
- commanding, by the controller, a read operation of the memory location to generate a null value at the memory location without an associated null value write operation to the memory location to erase the data at the memory location;
- operating a data bus in a read-mode of operation while generating the null value at the memory location;
- and
- continuing to operate the data bus in the read-mode of operation for one or more read requests until a write request is received.
2 more elements
Dependencies are inferred from the claim text.