Patent
1996-02-22
1997-09-23
Harvey, Jack B.
395280, 395283, 395750, 395700, H02H 900, G06F 944, G06F 132
Patent
active
056713681
ABSTRACT:
A PC Card controller, adapted for use in a laptop or notebook computer, generates a fake PC Card-insertion interrupt when a CPU, included in the computer, resumes normal operation after being in a lower power, Suspend operating mode. The PC Card controller includes a host-computer bus-interface adapted for exchanging interrupt signals with a bus included in the host computer. The PC Card controller also includes a PC Card interface-circuit for exchanging digital signals with a PC Card inserted into a PC Card socket included in the host computer. Insertion of a PC Card into the PC Card socket, while the CPU is in its normal operating mode, causes the PC Card interface-circuit to generate an interrupt signal for transmission to the CPU. The PC Card controller also includes a suspend/resume pin that receives a suspend/resume signal generated within the host computer. A fake PC Card-insertion-interrupt generating-circuit, upon detecting a state change in the suspend/resume signal that indicates resumption of normal CPU operation, generates an interrupt signal which simulates insertion of a PC Card into the PC Card socket.
REFERENCES:
patent: 5555510 (1996-09-01), Verseput et al.
Chan Reginia K.
Huang Yishao Max
Dharia Rupal D.
Harvey Jack B.
O.sub.2 Micro, Inc.
Scheiber Donald E.
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