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US 6,789,027 B2Granted
Method and apparatus for flash voltage detection and lockout
AssigneeIntel Corporation
InventorsSandeep K. Guliani, Rajesh Sundaram, Hari M. Rao, Johnny Javanifard
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Abstract
A method for voltage detection and lockout. The method of one embodiment first compares a reference voltage to a supply voltage to determine whether the voltage supply voltage is greater than the reference voltage. The reference voltage is validated by determining whether the reference voltage is at least a valid voltage potential. An unlock signal is generated if the supply voltage is greater than the reference voltage and if the reference voltage is valid.
Claims10
A method comprising:
- determining whether a first reference voltage is at least a predefined voltage potential, wherein a validity signal is generated to indicated if said predefined voltage potential has been reached;
- sampling a second reference voltage from a flash pair reference generator, said second reference voltage derived from said first reference voltage;
- comparing a supply voltage against said second reference voltage to determine whether said supply voltage has reached a lockout voltage potential, and generating a first result signal to indicated if said lockout voltage potential has been reached;
- and
- validating said comparison of said supply voltage with said second reference voltage, wherein said first result signal is treated as invalid if said validity signal indicates that said predefined voltage potential has not been reached by said first reference voltage and generating a lock signal to lock a circuit, otherwise generating said lock signal dependent on said fist result signal if said validity signal indicates that said first reference voltage has reached said predefined voltage potential.
2 more elements
A method comprising:
- detecting ramping of a first reference voltage from a reference generator,
- generating a validity indication based on a voltage potential of said first reference voltage, wherein said validity indication is to indicate a reference valid status if said first reference voltage has ramped up to at least a predetermined potential, otherwise said validity indication to indicate a reference invalid status;
- sampling a second reference voltage from said reference generator, said second reference voltage generated off said first reference voltage;
- generating a lockout indication based on whether a supply voltage has reached at least a voltage potential of said second reference voltage, wherein said lockout indication is to suggest a lockout setting if said supply voltage has a voltage potential below that of said second reference voltage, otherwise said lockout indication to suggest an unlock setting.
1 more element
Dependencies are inferred from the claim text.