| 摘要 |
PROBLEM TO BE SOLVED: To provide a PC card which may be controlled by detecting a power supply voltage with a lower electric power consumption, a lower cost and a simple circuit configuration. SOLUTION: The PC card according to the invention is characterized in comprising a main IC 11, a regulator 12 and a FET 13. The main IC comprises an interface 21, a CPU 22 and a power supply voltage detecting circuit 23. The power supply voltage detecting circuit 23 detects the voltage of the power supplied from a computer system such as a PC and outputs a control signal to the regulator 12 and FET 13 based upon the results of the detection. The regulator 12 and FET 13 control the power supply voltage based upon the control signal. |
