Non-volatile memory, memory card and information processing appa

Details Non-volatile memory, memory card and information processing appa Non-volatile memory, memory card and information processing appa

1998-06-19

2000-02-29

Chan, Eddie

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

365195, 711103, G06F 1216

Patent

active

060322373

ABSTRACT:
A non-volatile memory, such as a flash memory card, using a rewritable non-volatile memory is provided with an improved write-protect arrangement. The non-volatile memory includes a collectively electrically erasable and writable memory (e.g., a flash memory), a reset IC for generating a power-on reset signal upon turn-on of the power supply, and a card controller for performing control between each flash memory device and a memory card interface. The flash memory is set with a write protect save register written with an address of an area desired to be subjected to write protect, the write protect save register belonging to an attribute area, and a protect range is set from the system. Since the address to be write-protected is itself written in the non-volatile flash memory, the address will continue to be stored, even if the power is turned off. A method for software write protection control is also provided.

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INTEL, Series 2 Flash Memory Cards iMC002FLSA, iMC004FLSA, iMC010FLSA, iMC020FLSA, Oct. 1993, pp. 6-37 through 6-49.
INTEL, Series 2+ Flash Memory Cards 4 and 20 Megabytes, iMC004FLSP, iMC020FLSP, Dec. 1993, pp. 6-6 through 6-18.
Markus Levy, Series 2+ Flash Memory Cards User's Manual, pp. 2-6, 2-7, 2-24, 4-12 and 5-11 (INTEL Corp., Nov. 1993).

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