Card and host device
AssigneeKioxia Corporation
InventorAkihisa Fujimoto
Life of this patent
Estimating the term…
Abstract
A host device is configured to read and write information from and into a card and to supply a supply voltage that belongs to a first voltage range or a second voltage range which is lower than the first voltage range, and issues a voltage identification command to the card. The voltage identification command includes a voltage range identification section, an error detection section, and a check pattern section. The voltage range identification section includes information indicating which one of the first voltage range and the second voltage range the supply voltage belongs. The error detection section has a pattern configured to enable the card which has received the voltage identification command to detect errors in the voltage identification command. The check pattern section has a preset pattern.
Claims10
A memory card comprising:
- a memory;
- and
- a controller which
- controls the memory,
- receives from a host device a first command which includes a voltage identification section which has a bit pattern selected from two bit patterns, the bit pattern indicating voltages which the host device supports,
- determines whether the memory card supports the voltages indicated by the bit pattern in the voltage identification section of the first command, and
- issues a response which includes a voltage identification section which has the same bit pattern as the bit pattern in the voltage identification section of the first command when the memory card determines that the memory card supports the voltages indicated by the bit pattern in the voltage identification section of the first command.
A host device which:
- reads and writes data from and into a memory card,
- issues a first command which includes a voltage identification section which has a bit pattern selected from two bit patterns, the bit pattern indicating voltages which the host device supports,
- performs initialization of the memory card when the host device receives a response which includes a voltage identification section which has the same bit pattern as the bit pattern in the voltage identification section of the first command, and
- terminates initialization of the memory card when the host device does not receive a response to the first command.
A memory system including a host device and a memory device and being operated between the host device and the memory device, wherein the host device issues a first command to the memory device, the first command including an argument which indicates a range of voltage supplied by the host device, the memory device receives the first command and returns a response of the first command to the host device when a range of voltage supported by the memory device matches the range of voltage indicated in the argument, the host device issues a second command to the memory device, when the host device does not receive a response from the memory device to the first command, the memory device receives the second command with a first definition, supports a second command with the first definition, and returns a response of the second command with the first definition;
- when the host device receives a response from the memory device to the first command, the memory device receives the second command with a second definition, supports the second command with the second definition, upon reception of the second command, performs initialization of the memory device according to either the first definition or the second definition, and returns a result of the initialization of the memory device with response to the second command with the first definition or a result of the initialization of the memory device with response to the second command with the second definition.
Dependencies are inferred from the claim text.