Multiple power domain power loss detection and interface disable

Details Multiple power domain power loss detection and interface disable Multiple power domain power loss detection and interface disable

1996-01-22

1997-09-02

Beausoliel, Jr., Robert W.

3951822, G06F 1100

Patent

active

056640897

ABSTRACT:
A power loss detection and recovery circuit for providing continued memory operations upon loss of a supply voltage. Multiple independent power domains, each of which provides an electrically isolated supply voltage, are used to provide power to redundant memory circuitry. A loss of voltage or a degenerative voltage within a power domain is detected, and circuitry residing on a different operational power domain provides recovery operations to allow continued memory activity within that operational power domain. The memories residing in an adjacent pair of power domains redundant, and are therefore written to and read from simultaneously, and circuitry within an operational power domain will prevent further reading of data from the memory residing in a failed power domain, and will also prevent further writing of data to the memory residing in the failed power domain upon recognition of a failed supply voltage within a power domain.

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