Method and apparatus for upgrading reprogrammable memory content

Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition

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Details

711104, 711147, 711154, 711163, 365195, G06K 19067, G06F 1300, G06F 900

Patent

active

058025588

ABSTRACT:
An apparatus and a method for upgrading the memory contents of a removable computer card in a computer system. The computer card includes a specialized random access memory and circuitry that allows the computer system read only access to the contents of a first portion of the specialized random access memory device during normal operations. To upgrade the contents in the specialized random access memory, the circuitry allows the computer system write access privileges to the entire random access memory device. The computer card also includes a microcontroller which controls read and write access requests by the computer system to the specialized random access memory device. The microcontroller is placed in a reduced power consumption state when the computer system is performing read only access to the specialized random access memory device so that overall power consumption by the card in the computer system is reduced.

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Personal Computer Memory Card International Association, PCMCIA Standards, Release 2.01, Nov. 1992, pp. 1-1 through A-6.

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