1994-11-23
1997-08-05
Auve, Glenn A.
395282, G06F 1300
Patent
active
056550928
ABSTRACT:
The object of the invention is an expanded PCMCIA interface and a method for identifying such an expanded interface. According to the invention, among the power transmission pins of a standard PCMCIA interface, two of which are reserved for operating voltage and four for ground potential (P1, P2, P3, P4), maximally one operating voltage pin and three ground potential pins (P1, P2, P3, P4) have been redefined such that they are connected to a different voltage than standard voltage (GND, GND, VCC). This allows analogue and/or digital signals to be transferred through the redefined pins. Each redefined pin is preferably provided with a resistance coupling (Ra, R2, R3), by means of which the voltage prevailing in the redefined pin (P1, P2, P3, P4) has been raised (VCC) respectively dropped (GND) compared to the ground potential (GND) and operating voltage (VCC) of a standard pin. The PCMCIA interface according to the invention is identified such that the voltages of the redefined pins (P1, P2, P3, P4) are examined in a PCMCIA card (14) equipped with an expanded PCMCIA interface which can be installed in the PCMCIA card slot (16) of the host device (1) immediately after the card has been installed, and if the card slot (16) is identified as a card slot of an expanded PCMCIA interface (13), signals can be transferred through these redefined pines (P1, P2, P3, P4).
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patent: 4771399 (1988-09-01), Snowden et al.
patent: 5268819 (1993-12-01), Lonka
patent: 5292259 (1994-03-01), Scheldrake et al.
patent: 5451933 (1995-09-01), Stricklin et al.
patent: 5463261 (1995-10-01), Skarda et al.
PCMCiA Standards; Personal Computer Memory Card International Association; Sunnyvale, CA; Nov. 1992; pp. 4-2, 4-3 and 4-11.
Auve Glenn A.
Nokia Mobile Phones Limited
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