Electronic device with card interface
First Claim
Patent Images
1. A device comprising:
- connector pins including a plurality of data pins, a command pin, and a power signal pin, such that;
only one of the data pins is configured to receive data in a first operation mode, andthe plurality of data pins are configured to receive data in a second operation mode; and
a set of registers connected to the connector pins, the set of registers storing own operation mode information of the device, the own operation mode information including bus width information which indicates one of the first and second operation modes, wherein;
the command pin is configured to receive a first command for reading operation mode information, the operation mode information indicating one of the first and second operation modes;
one of the connector pins is configured to transmit the operation mode information in response to the first command;
the command pin is configured to receive a second command for reading operation voltage information, the operation voltage information concerning an operation voltage of the device;
one of the connector pins is configured to transmit the operation voltage information in response to the second command; and
the command pin is configured to receive a third command for setting an operation mode of the device into one of the first and second operation modes.
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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.
42 Citations
20 Claims
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1. A device comprising:
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connector pins including a plurality of data pins, a command pin, and a power signal pin, such that; only one of the data pins is configured to receive data in a first operation mode, and the plurality of data pins are configured to receive data in a second operation mode; and a set of registers connected to the connector pins, the set of registers storing own operation mode information of the device, the own operation mode information including bus width information which indicates one of the first and second operation modes, wherein; the command pin is configured to receive a first command for reading operation mode information, the operation mode information indicating one of the first and second operation modes; one of the connector pins is configured to transmit the operation mode information in response to the first command; the command pin is configured to receive a second command for reading operation voltage information, the operation voltage information concerning an operation voltage of the device; one of the connector pins is configured to transmit the operation voltage information in response to the second command; and the command pin is configured to receive a third command for setting an operation mode of the device into one of the first and second operation modes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device comprising:
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connector pins including a plurality of data pins, a command pin, and a power signal pin, such that; only one of the data pins is configured to receive data in a first operation mode, and the plurality of data pins are configured to receive data in a second operation mode; and a set of registers connected to the connector pins, the set of registers storing own operation mode information of the device, the own operation mode information including bus width information which indicates one of the first and second operation modes, wherein; the command pin is configured to receive a first command for reading operation mode information, the operation mode information indicating one of the first and second operation modes; one of the connector pins is configured to transmit the operation mode information in response to the first command; the command pin is configured to receive a second command for reading operation voltage information, the operation voltage information concerning an operation voltage of the device; one of the connector pins is configured to transmit the operation voltage information in response to the second command; the command pin is configured to receive a third command for setting an operation mode of the device into one of the first and second operation modes; and the device is configured to set the operation mode in response to the third command. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification