Electric device
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorMasanaka Mizuno
Life of this patent
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Abstract
In one embodiment, an electric device includes a memory, first and second generators, a limit unit, and a reduction unit. The first generator generates the chip select signal representing an inactive mode or an active mode according to a potential of an enable terminal and a input potential The second generator generates an enable signal which is a first level, a second level or a level having the first value as a maximum value. The limit unit limits the potential of the terminal to a potential lower than the first potential during first and second periods, and does not prevent from the enable signal from being input to the terminal during other periods. The reduction unit reduces the level of the enable signal at a predetermined rate, and then inputs the reduced enable signal to the terminal.
Claims6
An electric device, comprising:
- a memory that is accessed when a chip select signal represents an active mode, and not accessed when the chip select signal represents an inactive mode;
- a first generator that generates the chip select signal as a signal representing the inactive mode when a potential of an enable terminal is lower than a first potential, and generates the chip select signal as a signal representing any one of the active mode and the inactive mode according to a potential of an input terminal when the potential of the enable terminal is equal to or higher than a second potential;
- a second generator that generates an enable signal as a signal of a first level or a second level lower than the first level when a first supply voltage is a first voltage value or higher, and generates the enable signal as a signal having the first voltage value as a Maximum value when the first supply voltage is lower than the first voltage value;
- a limit unit that limits the potential of the enable signal to a potential lower than the first potential during a period when the first supply voltage is equal to or higher than a second voltage value and lower than a third voltage value, and during a period when a given time elapses since the first supply voltage becomes equal to or higher than the second voltage value, and does not prevent from the enable signal generated by the second generator from being input to the enable terminal during other periods;
- and
- a reduction unit that reduces the level of the enable signal at a predetermined rate, and inputs the reduced enable signal to the enable terminal.
Dependencies are inferred from the claim text.