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US 2020/0004318 A1Published application
Card and host apparatus
AssigneeToshiba Memory Corporation
InventorAkihisa FUJIMOTO
Life of this patent
Estimating the term…
Abstract
A host apparatus, into which a card having a nonvolatile semiconductor memory is inserted, issues a check command to the card. The check command instructs to send information on whether the card supports a termination process in which the card shifts into a state ready for a stop of power supply from the host apparatus.
Claims7
1-10. (canceled)
11:
- A memory system comprising a host apparatus connectable to a memory device which comprises a memory core and a memory controller, the host apparatus configured to:
- send a first command to the memory device,
- receive a response transmitted from the memory device, in response to the first command, the response including status data that is used to determine whether the memory device supports a termination process, the termination process including shifting into a state ready for a stop of power supply from the host apparatus,
- send a function stop command to the memory device so that the memory device performs the termination process in response to the function stop command,
- receive a first signal while performing the termination process, the first signal being indicative of a busy state and having a first level, and
- receive as a notification a second signal being indicative of a ready state and having a second level when the memory device completes the termination process.
3 more elements
12:
- The memory system according to claim 11, wherein the termination process includes writing data stored in a volatile semiconductor memory into the memory core.
13:
- The memory system according to claim 11, wherein the memory system is configured to change the information to indicate that the termination process has not been completed when a status of the memory system has changed since completion of a latest initialization.
14:
- The memory system according to claim 11, wherein the memory system is configured to:
- receive an initialization command instructing to carry out initialization,
- execute initialization using a first initialization method when the information indicates that the termination process has not been completed, and
- execute initialization using a second initialization method, which is finished quicker than the first initialization method, when the memory core indicates that the termination process has been completed.
1 more element
15:
- The memory system according to claim 14, wherein the second initialization method comprises the first initialization method with a part of it omitted.
16:
- The memory system according to claim 15, wherein the omitted part includes at least one of checking for errors of data stored in the memory core, restoring the errors, and constructing a translation table showing a relation between logical addresses of write data and physical addresses of the memory core which stores the write data.