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US 2018/0191343 A1Published application
ADAPTIVE VOLTAGE SCALING SYSTEM FOR OUT OF CONTEXT FUNCTIONAL SAFETY SoC
AssigneeTexas Instruments Incorporated
InventorsVenkateswar Reddy Kowkutla, Chunhua Hu, Erkan Bilhan, Sumant Dinkar Kale
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Abstract
The optimal operating voltage of a complex SoC may be influenced by process variations. The operating voltages may be dynamically adjusted for optimal performance. These adjustments require a dynamic reconfiguration of the voltage monitoring thresholds in the power on reset circuitry of the SoC.
Claims4
A method of adaptive power scaling during reset on a SoC (System on a Chip) comprising the steps of:
- masking the power OK signals;
- programming the power supplies to new voltage levels;
- delaying for a preset period to allow said voltage levels to stabilize;
- calculating new thresholds for the voltage comparator circuits;
- applying said thresholds to said voltage comparators;
- delaying for a preset period to allow said voltage comparators to stabilize;
- unmasking said power OK signals;
- comparing said power supply voltages to said voltage threshold values in said voltage comparators;
- generating a power on reset signal in said voltage comparators when said power supply voltages are lower than said voltage threshold values in said comparators;
- generating a master reset signal when one or more of said voltage comparators is generating a power on reset signal.
7 more elements
An apparatus for adaptive power scaling during reset comprising of:
- a power on reset circuit operable to
- mask the power OK signals;
- program the programmable power supplies to new voltage levels;
- delay for a preset period to allow said voltage levels to stabilize;
- calculate new thresholds for the voltage comparator circuits;
- apply said thresholds to said voltage comparators;
- delay for a preset period to allow said voltage comparators to stabilize;
- unmask said power OK signals;
- compare said power supply voltages to said voltage threshold values in said voltage comparators;
- generate a power on reset signal in said voltage comparators when said power supply voltages are lower than said voltage threshold values in said comparators;
- generate a master reset signal when one or more of said voltage comparators is generating a power on reset signal.
8 more elements
Dependencies are inferred from the claim text.