Storage control device, storage device, and information processing system
AssigneeSony Semiconductor Solutions Corporation
InventorAtsuo Mangyo
Life of this patent
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Abstract
A state of a reference cell in a storage device is appropriately managed. A first memory cell array includes a first reference cell that generates reference potential of a sense amplifier. A second memory cell array includes a second reference cell that generates reference potential of a sense amplifier. A state storage unit stores, regarding each of the first and second reference cells, a state indicating certainty of a held value. When write to either one of the first and second reference cells is instructed, the write control unit controls the instructed write on the basis of the state regarding the first and second reference cells stored in the state storage unit.
Claims14
A storage control device comprising:
- a state storage unit that stores, regarding each of a first reference cell that generates reference potential of a sense amplifier, the first reference cell included in a first memory cell array, and a second reference cell that generates reference potential of the sense amplifier, the second reference cell included in a second memory cell array, a state indicating certainty of a held value;
- and
- a write control unit that controls, when write to either one of the first and second reference cells is instructed, the instructed write on a basis of the state regarding the first and second reference cells stored in the state storage unit.
A storage device comprising:
- a first memory cell array including a first reference cell that generates reference potential of a sense amplifier;
- a second memory cell array including a second reference cell that generates reference potential of the sense amplifier;
- a state storage unit that stores, regarding each of the first and second reference cells, a state indicating certainty of a held value;
- and
- a write control unit that controls, when write to either one of the first and second reference cells is instructed, the instructed write on a basis of the state regarding the first and second reference cells stored in the state storage unit.
An information processing system comprising:
- a first memory cell array including a first reference cell that generates reference potential of a sense amplifier;
- a second memory cell array including a second reference cell that generates reference potential of the sense amplifier;
- a host computer that issues commands to perform read or write to the first and second memory cell arrays;
- a state storage unit that stores, regarding each of the first and second reference cells, a state indicating certainty of a held value;
- and
- a write control unit that controls, when write to either one of the first and second reference cells is instructed, the instructed write on a basis of the state regarding the first and second reference cells stored in the state storage unit.
Dependencies are inferred from the claim text.