Memory system and information processing system
AssigneeKioxia Corporation
InventorDaisuke UCHIDA
Life of this patent
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Abstract
In general, according to one embodiment, a memory system includes: a nonvolatile memory including a plurality of memory cells; and a memory controller having a first state in which write data transferred from an external host is written in the nonvolatile memory at a rate of a first number of bits per memory cell, and a second state in which the write data is written at a rate of a second number of bits per memory cell. The second number of bits differs from the first number of bits. The memory controller is configured to transmit information relating to a transfer rate of the write data to the host in response to a first request from the host. The information includes: first information associated with the first state; and second information associated with the second state.
Claims14
A memory system comprising:
- a nonvolatile memory including a plurality of memory cells;
- and
- a memory controller having a first state in which write data transferred from an external host is written in the nonvolatile memory at a rate of a first number of bits per memory cell, and a second state in which the write data is written at a rate of a second number of bits per memory cell, the second number of bits larger than the first number of bits, wherein
- the memory controller is configured to transmit information relating to a transfer rate of the write data to the host in response to a first request from the host,
- the information includes:
- first information associated with the first state;
- and second information associated with the second state,
- the memory controller is configured to:
- receive, in the first state, the write data from the host at a first transfer rate;
- and
- receive, in the second state, the write data from the host at a second transfer rate that is lower than the first transfer rate and higher than a written speed in the second state,
- the first information includes a first number of lanes and a first frequency,
- the second information includes a second number of lanes and a second frequency,
- in a case where the first number of lanes and the second number of lanes are equal, the first frequency is higher than the second frequency, and
- in a case where the first frequency and the second frequency are equal, the first number of lanes is greater than the second number of lanes.
An information processing system comprising:
- a host;
- and
- a memory system, wherein
- the memory system includes:
- a nonvolatile memory including a plurality of memory cells;
- a memory controller having a first state in which write data transferred from the host is written in the nonvolatile memory at a rate of a first number of bits per memory cell, and a second state in which the write data is written at a rate of a second number of bits per memory cell, the second number of bits larger than the first number of bits, wherein
- the memory controller is configured to transmit information relating to a transfer rate of the write data to the host in response to a first request from the host,
- the information includes:
- first information associated with the first state;
- and
- second information associated with the second state, and
- the host is configured to:
- transmit, in a case where the memory controller is operated in the first state, the write data to the memory controller at a first transfer rate, based on the first information;
- and
- transmit, in a case where the memory controller is operated in the second state, the write data to the memory controller at a second transfer rate that is lower than the first transfer rate and higher than a written speed in the second state, based on the second information,
- the first information includes a first number of lanes and a first frequency,
- the second information includes a second number of lanes and a second frequency,
- in a case where the first number of lanes and the second number of lanes are equal, the first frequency is higher than the second frequency, and
- in a case where the first frequency and the second frequency are equal, the first number of lanes is greater than the second number of lanes.
Dependencies are inferred from the claim text.