Limited use circuit

Details Limited use circuit Limited use circuit

1995-03-09

1998-06-02

Gregory, Bernarr E.

Telecommunications

Use or access blocking

377 15, 327525, 380 4, 380 6, 380 23, 380 25, H04L 900

Patent

active

057616094

ABSTRACT:
A limited use circuit in an electronic system that comprises a state machine which controls the operability of the electronic system and determines after boot whether a non-volatile memory device is at its initial data point and then allows the system to operate if it is at its initial data point or cause the electronic system to go down if it is not wherein the state machine is comprised of registers and logic gates or a CPU and a mask circuit and the non-volatile memory device may be selected from the group consisting of PLD, PAL, PLA, EEPROM, FLASH and ROM.

REFERENCES:
patent: 4642631 (1987-02-01), Rak
patent: 4749991 (1988-06-01), Davis et al.
patent: 4879645 (1989-11-01), Tamada et al.
patent: 5442704 (1995-08-01), Holtey

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