Reset recovery in a microprocessor controlled device

Details Reset recovery in a microprocessor controlled device Reset recovery in a microprocessor controlled device

G - Physics

06

F

G06F 1/24 (2006.01) G05B 9/02 (2006.01)

Patent

CA 2129581

A method for recovering from a reset in a microprocessor includes steps of evaluating a predetermined pattern in a volatile memory (102), determining the type of reset which occurred depending upon whether the predetermined pattern is intact (103); and initializing the memory depending upon the type of reset. In particular, all locations in the memory will be initialized if a "power on" reset occurs (107) and initializing only selected portions of the memory if a "static" or "cradled" reset has occurred (104). If a static or cradled reset has occurred, all locations of the memory are initialized except those locations including state information to allow normal operation of the microprocessor. That is, the operation of the microprocessor based device can be restored without interruption after the reset.

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