Abstract: An input circuit for an integrated circuit device may include a boosting circuit, a protection circuit, and a buffer circuit. The boosting circuit is configured to receive a supply voltage of the integrated circuit device and to generate a boosted voltage higher than the supply voltage. The protection circuit is configured to receive an input signal and the boosted voltage and to generate an output signal that changes responsive to changes in the input signal. The buffer circuit is configured to generate a buffered output signal responsive to the output signal generated by the protection circuit. Related methods are also discussed.

Abstract: An input circuit for an integrated circuit device may include a boosting circuit, a protection circuit, and a buffer circuit. The boosting circuit is configured to receive a supply voltage of the integrated circuit device and to generate a boosted voltage higher than the supply voltage. The protection circuit is configured to receive an input signal and the boosted voltage and to generate an output signal that changes responsive to changes in the input signal. The buffer circuit is configured to generate a buffered output signal responsive to the output signal generated by the protection circuit. Related methods are also discussed.

Abstract: An impedance control circuit designed to match the impedance between a semiconductor device and a transmission medium (PCB) by using a current source installed in the semiconductor device instead of using an external resistor is provided. Since the impedance control circuit does not use an external resistor for impedance matching, the PCB size can be reduced. In particular, a controllable current source matches the impedance more precisely compared to the external resistor.

Abstract: Disclosed is a data processing system comprising a control unit for receiving data from a main core and outputting given control signals, a level shifter for amplifying the electric potential of said given control signals and outputting corresponding driving signals, a data output buffer for receiving said driving signals from said level shifter and outputting a driving voltage having a voltage range defined in the PCI or/and PCI-X specifications, to an input/output pad, and said data output buffer being in a high impedance state to prevent a PCI mode voltage inputted to said pad from being leaked to a power source terminal when said data processing system is operated in PCI mode.

Abstract: An impedance control circuit designed to match the impedance between a semiconductor device and a transmission medium (PCB) by using a current source installed in the semiconductor device instead of using an external resistor is provided. Since the impedance control circuit does not use an external resistor for impedance matching, the PCB size can be reduced. In particular, a controllable current source matches the impedance more precisely compared to the external resistor.

Abstract: Disclosed is a data processing system comprising a control unit for receiving data from a main core and outputting given control signals, a level shifter for amplifying the electric potential of said given control signals and outputting corresponding driving signals, a data output buffer for receiving said driving signals from said level shifter and outputting a driving voltage having a voltage range defined in the PCI or/and PCI-X specifications, to an input/output pad, and said data output buffer being in a high impedance state to prevent a PCI mode voltage inputted to said pad from being leaked to a power source terminal when said data processing system is operated in PCI mode.