Patent ID: 6052014
Filing Date: 2000-04-18
Classification: G06F

Abstract:
An integrated circuit comprising:at least one external terminal;at least one input/output part provided corresponding to said at least one external terminal, each operating with a first voltage to transfer/receive a signal to/from a device outside of said integrated circuit through said at least one external terminal corresponding thereto;a control circuit operating with a second voltage, different from the first voltage, to define a function of said at least one external terminal through said at least one input/output part; andat least one voltage conversion part connected between the at least one input/output part and the control circuit, and provided corresponding to said at least one input/output part, each havinga first level shifter for shifting a voltage level of a first signal at the second voltage which is outputted from said control circuit in response to a difference between said first and second voltages, to output a first shifted signal at the first voltage to said at least one input/output part corresponding thereto, anda second level shifter for shifting a voltage level of a second signal at the first voltage which is inputted from said at least one input/output part corresponding thereto in response to said difference to output a second shifted signal at the second voltage to said control circuit,wherein at least one port is constructed with said at least one external terminal, said at least one input/output part, said at least one voltage conversion part.