Power supply detection device
AssigneeSTMicroelectronics S.r.l.
InventorsSylvain Majcherczak, Guy Mabboux
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Abstract
In an integrated circuit, a detection device detects a drop in the supply voltage of the core of the integrated circuit or an excessively slow build-up of this voltage with respect to a supply voltage of the input/output interface circuits of the integrated circuit. Outputs of the interface circuits are set to a high impedance state by the detection device to minimize their power consumption.
Claims9
A device for the detection of the level of the core supply voltage of an integrated circuit with respect to the level of an interface power supply voltage at a higher nominal level, applied as a power supply voltage to interface circuits of said integrated circuit, for the transmission of input/output signals, said detection device giving a detection signal applied to said interface circuits to set their output in a state of high impedance and minimize their power consumption when the level of the core supply voltage is far too low to enable the working of the integrated circuit, said detection corresponding to a power-off situation of the core power supply.
Dependencies are inferred from the claim text.