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US 7,453,741 B2Granted
Semiconductor device card providing multiple working voltages
AssigneeSamsung Electronics Co., Ltd.
InventorsSang-Bum Kim, Sam-Yong Bahng, Chil-Hee Chung
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Abstract
A semiconductor device card, such as a memory card for example, includes a semiconductor device, a working voltage indicator, and a working voltage generator. A working voltage indicator is set to indicate a desired level of a working voltage corresponding to the semiconductor device. A working voltage generator generates the working voltage having the desired level and being coupled to the semiconductor device. Thus, the semiconductor device card is easily adaptable to accommodate various working voltages of the semiconductor device.
Claims35
A semiconductor device card comprising:
- a semiconductor device;
- a working voltage indicator that is set to indicate a desired level of a working voltage corresponding to the semiconductor device;
- and
- a working voltage generator for generating the working voltage having said desired level and being coupled to the semiconductor device, wherein the voltage generator further includes:
- a plurality of reference voltage generators, each generating a respective target voltage;
- and wherein the working voltage indicator includes:
- a multiplexer for coupling a selected target voltage indicating the desired level from one of the reference voltage generators to the working voltage generator;
- and
- at least one option pin coupled to the multiplexer, wherein each option pin is fixedly connected to a respective voltage source that continuously maintains a respective voltage at a respective constant level durina operation of the semiconductor device for permanently indicatmnn the selected target voltage.
6 more elements
A semiconductor device card comprising:
- a semiconductor device;
- a working voltage indicator that is set to indicate a desired level of a working voltage corresponding to the semiconductor device;
- a working voltage generator for generating the working voltage having said desired level and being coupled to the semiconductor device, wherein the voltage generator further includes:
- a plurality of reference voltage generators, each generating a respective target voltage;
- and wherein the working voltage indicator includes:
- a multiplexer for coupling a selected target voltage indicating the desired level from one of the reference voltage generators to the working voltage generator;
- and
- at least one option pin coupled to the multiplexer, wherein each option pin is fixedly coupled to a respective one of a first voltage for a logical high state or a second voltage for a logical low state for fixedly indicating the selected target voltage;
- a first contact pad having the first voltage applied thereon;
- a second contact pad having the second voltage applied thereon;
- a host voltage line connected to the first contact pad;
- and
- a host ground line connected to the second contact pad;
- wherein each option pin is connected to a respective one of the host voltage line and the host ground line such that the selected target voltage is fixedly indicated.
11 more elements
A semiconductor device card comprising:
- a semiconductor device;
- a working voltage indicator that is set to indicate a desired level of a working voltage corresponding to the semiconductor device;
- and
- a working voltage generator for generating the working voltage having said desired level and being coupled to the semiconductor device;
- wherein the working voltage indicator includes:
- a voltage select decoder that asserts one of a voltage up signal, a voltage down signal, and a voltage pass signal from comparing a host voltage and the working voltage;
- and wherein the working voltage generator includes:
- a first voltage generator for generating the working voltage boosted from the host voltage when the voltage up signal is asserted to indicate that the desired level of the working voltage is greater than the host voltage;
- a second voltage generator for generating the working voltage as the host voltage when the voltage pass signal is asserted to indicate that the desired level of the working voltage is substantially equal to the host voltage;
- and
- a third voltage generator for generating the working voltage stepped down from the host voltage when the voltage down signal is asserted to indicate that the desired level of the working voltage is less than the host voltage.
8 more elements
Dependencies are inferred from the claim text.