| 摘要 |
<p>Disclosed is an input/output device controller for securely supplying power to a PC card that is loaded into a slot of a personal computer. The input/output device controller, which permits an information processing apparatus to communicate with an input/output device, comprises: an interface that is employed for data exchange with the input/output bus of the information processing apparatus, a register for temporarily holding part of a data group that is to be exchanged, a driver for transmitting a signal to the input/output device, a power enabler for, in consonance with the contents written in the register, connecting/disconnecting a power line that joins the input/output device to a power source, and detection means for detecting an over current across the power line; and writes in the register the detection result and renders off the driver in response to the detection result. when an abnormality is detected in the supply of power to the PC card, the detection result can be reported to the PC. In addition, when an abnormality in the supply of power to the PC card is detected, the output of the driver for transmitting a signal to the PC card is halted, and the destruction of the internal circuit of the PC card due to the latch-up can be prevented. <IMAGE></p> |
