Electronic device with card interface
First Claim
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1. A storage device that communicates with an electronic device, the storage device comprising:
- a plurality of connector pins comprising data pins and a power signal pin, the connector pins configured to be connectable to the electronic device;
an interface including a transmitter, the interface configured to execute data transfer from the storage device to the electronic device using m number of data pins among the data pins (where m is a natural number) between the storage device and the electronic device which are capable of transmitting data using n number of data pins (where n is a natural number greater than m) in a first operation mode;
a first register storing operation mode information of the storage device, the operation mode information concerning a second operation mode, the second operation mode being an operation mode to execute data transfer from the storage device to the electronic device using the n number of data pins among the data pins; and
a second register storing operation voltage information, the operation voltage information concerning an operation voltage of the storage device, wherein;
the transmitter is configured to transmit the operation mode information to the electronic device via at least one of the connector pins, when a first command for reading the operation mode information is received from the electronic device via at least one of the connector pins;
the transmitter is configured to transmit the operation voltage information to the electronic device via at least one of the connector pins, when a second command for reading the operation voltage information is received from the electronic device via at least one of the connector pins;
the interface is configured to execute data transfer from the storage device to the electronic device using the n number of data pins in the second operation mode; and
the interface is configured to switch from the first operation mode to the second operation mode and from the second operation mode to the first operation mode in accordance with a selection by the electronic device.
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Abstract
When initializing a card-shaped device inserted in a card interface, operation mode acquiring means incorporated in an electronic device acquires operation mode information, stored in a register file incorporated in the card-shaped device, by a predetermined procedure using a predetermined pin. Operation mode setting means incorporated in the electronic device executes signal assignment on a plurality of data pins peculiar to an operation mode indicated by the acquired operation mode information, thereby switching a data transfer width, and allowing the card-shaped device to operate in the operation mode.
45 Citations
20 Claims
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1. A storage device that communicates with an electronic device, the storage device comprising:
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a plurality of connector pins comprising data pins and a power signal pin, the connector pins configured to be connectable to the electronic device; an interface including a transmitter, the interface configured to execute data transfer from the storage device to the electronic device using m number of data pins among the data pins (where m is a natural number) between the storage device and the electronic device which are capable of transmitting data using n number of data pins (where n is a natural number greater than m) in a first operation mode; a first register storing operation mode information of the storage device, the operation mode information concerning a second operation mode, the second operation mode being an operation mode to execute data transfer from the storage device to the electronic device using the n number of data pins among the data pins; and a second register storing operation voltage information, the operation voltage information concerning an operation voltage of the storage device, wherein; the transmitter is configured to transmit the operation mode information to the electronic device via at least one of the connector pins, when a first command for reading the operation mode information is received from the electronic device via at least one of the connector pins; the transmitter is configured to transmit the operation voltage information to the electronic device via at least one of the connector pins, when a second command for reading the operation voltage information is received from the electronic device via at least one of the connector pins; the interface is configured to execute data transfer from the storage device to the electronic device using the n number of data pins in the second operation mode; and the interface is configured to switch from the first operation mode to the second operation mode and from the second operation mode to the first operation mode in accordance with a selection by the electronic device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A storage device that communicates with an electronic device, the storage device comprising:
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a plurality of connector pins comprising data pins and a power signal pin, the connector pins configured to be connectable to the electronic device; an interface including a transmitter, the interface configured to execute data transfer from the electronic device to the storage device using m number of data pins among the data pins (where m is a natural number) between the electronic device which is capable of transmitting data using n number of data pins (where n is a natural number greater than m) and the storage device in a first operation mode; a first register storing operation mode information of the storage device, the operation mode information concerning a second operation mode, the second operation mode being an operation mode to execute data transfer from the electronic device to the storage device using the n number of data pins among the data pins and a second register storing operation voltage information, the operation voltage information concerning an operation voltage of the storage device wherein; the transmitter is configured to transmit the operation mode information to the electronic device via at least one of the connector pins, when a first command for reading the operation mode information is received from the electronic device via at least one of the connector pins; the transmitter is configured to transmit the operation voltage information to the electronic device via at least one of the connector pins, when a second command for reading the operation voltage information is received from the electronic device via at least one of the connector pins; the interface is configured to execute data transfer from the electronic device to the storage device using the n number of data pins in the second operation mode; and the interface is configured to switch from the first operation mode to the second operation mode and from the second operation mode to the first operation mode in accordance with a selection by the electronic device. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification