PC card

Details PC card PC card

1995-11-16

1998-08-18

Sheikh, Ayaz R.

Static information storage and retrieval

Magnetic bubbles

Guide structure

365229, G06F 130

Patent

active

057970246

ABSTRACT:
A PC card wherein a voltage supplied by an auxiliary battery is confirmable from an external device in a state in which an interface is maintained. A selection signal from an address decode circuit changes to a significant condition when a given address in an unused memory area is accessed in accordance with an address signal, with the result that a MOSFET transistor turns on so that the auxiliary battery makes contact with a voltage detector to detect the voltage of the auxiliary battery. The detection result is temporarily stored in a register and output as a portion of data to the external device at the time that a register output enable signal changes to a significant condition by an output enable signal.

REFERENCES:
patent: 4313180 (1982-01-01), Mochizuki et al.
patent: 4587640 (1986-05-01), Saitoh
patent: 5272677 (1993-12-01), Yammura
patent: 5442277 (1995-08-01), Mori et al.

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