Importance

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Abstract

By providing various functions in an X-terminal, the PCMCIA card controlling interface circuit supports various I/O functions through the same PCMCIA card that is used in personal computers. It also has more convenient and varied software support by using the PCMCIA memory card. In order to achieve this object, the PCMCIA card controlling interface circuit includes a clock signal generator, a PCMCIA card, a main processor, a bus interface, and a PCMCIA card controller. The clock-signal generator outputs a CLOCK signal. The PCMCIA card includes a number of memory card and I/O cards. The main processor outputs an address, a control signal and a driving signal to read and write to the PCMCIA card in accordance with a clock signal from said clock-signal generator. The bus interface is connected with an output unit of the main processor, and outputs a bus operating signal according to a driving signal from the main processor, and outputs a corresponding command to process an applied address and an applied control signal, and then outputs a stop signal. The PCMCIA card controlling interface therefore controls data transmission, data reception, and a control-signal. The PCMCIA card controller inputs an address from the main processor in accordance with the bus-operating-signal from the bus interface, performs a Read/Write operation of the PCMCIA-card's data according to the applied command, and stops the present operation in accordance with the applied stop signal.

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First Claim