Hardware memory write lock circuit

Details Hardware memory write lock circuit Hardware memory write lock circuit

G - Physics

06

F

354/243

G06F 9/06 (2006.01) G06F 12/14 (2006.01) G06F 13/00 (2006.01)

Patent

CA 1153474

HARDWARE MEMORY WRITE LOCK CIRCUIT Abstract of the Disclosure A hardware circuit for protecting against the accidental writing in an area of memory which contains critical data. In order to access the critical data memory area during a write cycle, it is necessary first to control predetermined memory access cycles which include, for exam- ple, the writing of predetermined data at a predetermined address. After detection of such a "fictitious" write cycle, the hardware allows the next write cycle to access the critical data memory area.

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