Storage device and operating method thereof
First Claim
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1. A storage device comprising:
- a memory block including a plurality of sub-blocks having normal cells storing normal data and spare cells storing information on erased sub-blocks;
a peripheral circuit suitable for generating operation voltages used in a read operation on a selected sub-block, and performing the read operation on the selected sub-block using the operation voltages; and
a control logic suitable for, in the read operation, controlling the peripheral circuit to lower a level of at least one operation voltage when an erased sub-block is included in the memory block.
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Abstract
There are provided a storage device and an operating method thereof. A storage device includes a main block including a plurality of sub-blocks, a peripheral circuit for generating operation voltages used in a read operation of a selected sub-block among the sub-blocks and performing the read operation of the selected sub-block by using the operation voltages, and a control logic for, when an erased sub-block among the sub-blocks is included in the read operation, controlling the peripheral circuit to perform the read operation by lowering levels of some of the operation voltages.
7 Citations
14 Claims
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1. A storage device comprising:
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a memory block including a plurality of sub-blocks having normal cells storing normal data and spare cells storing information on erased sub-blocks; a peripheral circuit suitable for generating operation voltages used in a read operation on a selected sub-block, and performing the read operation on the selected sub-block using the operation voltages; and a control logic suitable for, in the read operation, controlling the peripheral circuit to lower a level of at least one operation voltage when an erased sub-block is included in the memory block. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of operating a storage device, the method comprising:
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determining whether an erased sub-block exists in a selected memory block; and performing, when it is determined that the erased sub-block exists, a read operation on the selected memory block using second operation voltages having lower levels than first operation voltages which are applied to the selected memory block when it is determined that the erased sub-block does not exist, wherein the first operation voltages include a first read voltage applied to a selected word line, a first pass voltage applied to unselected word lines, a first source turn-on voltage applied to a source select line, and a first drain turn-on voltage applied to a drain select line, and wherein the second operation voltages include at least one of a second source turn-on voltage lower than the first source turn-on voltage, and a second drain turn-on voltage lower than the first drain turn-on voltage. - View Dependent Claims (8, 9, 10, 11)
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12. A storage device comprising:
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a memory block including a plurality of sub-blocks; a peripheral circuit suitable for generating operation voltages used in a read operation on a selected sub-block, and performing the read operation on the selected sub-block using the operation voltages; and a control logic suitable for, in the read operation, controlling the peripheral circuit in response to a command and an address to lower a level of at least one operation voltage when an erased sub-block is included in the memory block, wherein the control logic includes a register storing information of the erased sub-block. - View Dependent Claims (13, 14)
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Specification