| CPC G06F 1/26 (2013.01) [G06F 1/266 (2013.01); G06F 1/189 (2013.01); G06F 1/3225 (2013.01); G06F 1/3275 (2013.01); G06K 19/06037 (2013.01)] | 14 Claims |
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1. A removable memory device insertable into and detachable from a socket in a host and operating with first and second powers supplied from the host, the first and second powers having voltages different from each other, the removable memory device comprising:
a plurality of terminals including one or more first power supply terminals to which the first power is supplied and one or more second power supply terminals to which the second power is supplied;
a nonvolatile memory; and
a controller configured to control the nonvolatile memory, wherein
the removable memory device is configured to support one current consumption class among plural types of current consumption classes defining a plurality of current consumptions different from each other, both a current consumption for the first power and a current consumption for the second power being defined in each of the plural types of current consumption classes,
in a case where the one current consumption class supported by the removable memory device is a first current consumption class having a largest current consumption value among the plural types of current consumption classes,
a first current consumption value consumed from the first power by the removable memory device is smaller than or equal to a first permissible current value that is a maximum current value permitted to be supplied from the host to the one or more first power supply terminals of the removable memory device via a contact resistance between a terminal of the socket and a terminal of the removable memory device, and
a second current consumption value consumed from the second power by the removable memory device is smaller than or equal to a second permissible current value that is a maximum current value permitted to be supplied from the host to the one or more second power supply terminals of the removable memory device via the contact resistance, and
in a case where the one current consumption class supported by the removable memory device is another current consumption class different from the first current consumption class,
the first current consumption value is smaller than or equal to a third permissible current value for the first power defined in said another current consumption class, and
the second current consumption value is smaller than or equal to a fourth permissible current value for the second power defined in said another current consumption class.
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