| 摘要 |
A card read and write controller for use in a personal computer according to the present invention includes a voltage generator for supplying a power voltage to the chip-in card when the chip-in card is inserted into a card insertion slot; a clock generator for supplying an initial clock signal to the chip-in card. A bus interface serves the host controller, while a serial port accommodates serial data communication with the host controller. A bootable read-only-memory (ROM) provides a booting control program, a common random-access-memory (RAM) stores operational and program data, and a central processing unit (CPU) controls activation of a light-emitting-diode (LED) indicating the insertion or ejection of the chip-in card, generates the interrupt signal, and checks whether data transmitted to the card and data received from the card are identical with each other to determine that the inserted chip-in card is an authorized card for the personal computer system.
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