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US 7,890,729 B2Granted
Memory card and host device thereof
AssigneeKabushiki Kaisha Toshiba
InventorTakafumi Ito
Life of this patent
Estimating the term…
Abstract
A memory card is attached to a host device, and includes a data control circuit which transfers data with respect to the host device in synchronism with a rise edge and a fall edge of a clock signal.
Claims32
A storage device comprising:
- a command terminal;
- a plurality of data terminals;
- a clock terminal;
- a power terminal for a power supply voltage;
- a ground terminal for a ground voltage;
- a nonvolatile memory;
- and
- a controller coupled to the command terminal, the data terminals, the clock terminal, the power terminal, and the ground terminal, wherein:
- the controller is configured to receive the clock signal through the clock terminal from the outside of the storage device;
- the controller is configured to output data through at least one of the data terminals to the outside of the storage device, in accordance with only one of a rising edge and a falling edge of the clock signal, in a first transfer mode;
- the controller is configured to output data through at least one of the data terminals to the outside of the storage device, in accordance with both the rising edge and the falling edge of the clock signal, in a second transfer mode;
- the controller is configured to receive a first command of a check function through the command terminal from the outside of the storage device;
- the controller is configured to output first status data that includes information indicating that the storage device supports the second transfer mode, through one of the data terminals to the outside of the storage device, in response to the first command of the check function;
- the controller is configured to receive a first command of a set function through the command terminal from the outside of the storage device;
- the controller is configured to set the storage device into the second transfer mode in response to the first command of the set function;
- and
- a mode bit in the first command determines either the check function or the set function of the first command.
14 more elements
A storage device comprising:
- a command terminal;
- a plurality of data terminals;
- a clock terminal;
- a power terminal for a power supply voltage;
- a ground terminal for a ground voltage;
- a nonvolatile memory;
- and
- a controller coupled to the command terminal, the data terminals, the clock terminal, the power terminal, and the ground terminal, wherein:
- the controller is configured to receive the clock signal through the clock terminal from the outside of the storage device;
- the controller is configured to latch data received through at least one of the data terminals from the outside of the storage device, in accordance with only one of a rising edge and a falling edge of the clock signal, in a first transfer mode;
- the controller is configured to latch data received through at least one of the data terminals from the outside of the storage device, in accordance with both the rising edge and the falling edge of the clock signal, in a second transfer mode;
- the controller is configured to receive a first command of a check function through the command terminal;
- the controller is configured to output first status data that includes information indicating that the storage device supports the second transfer mode, through one of the data terminals to the outside of the storage device, in response to the first command of the check function;
- the controller is configured to receive a first command of a set function through the command terminal from the outside of the storage device;
- the controller is configured to set the storage device into the second transfer mode in response to the first command of the set function;
- and
- a mode bit in the first command determines either the check function or the set function of the first command.
14 more elements
Dependencies are inferred from the claim text.