System and method to accelerate power safety management start-up sequence
AssigneeNXP USA, Inc.
InventorsGuillaume Jean Founaud, Pierre Turpin, Valerie Bernon
Life of this patent
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Abstract
To help reduce the amount of time before a safety power management integrated circuit (PMIC) releases a processing system from a safety state, the safety PMIC includes a first digital circuitry that first configures a voltage threshold comparator and then enables a voltage regulator to provide power to the rest of the PMIC. Additionally, concurrently with the rest of the PMIC powering on, the safety PMIC includes a second digital circuitry that is distinct from the first digital circuitry and that performs a logic built-in self-test (LBIST) for a safety logic circuitry configured to monitor the voltage threshold comparator.
Claims21
1-15. (canceled)
An integrated circuit (IC), comprising:
- a first digital circuitry configured to:
- configure a voltage threshold comparator based on configuration data;
- and
- based on the voltage threshold comparator being configured, enable a voltage regulator such that the voltage regulator outputs a voltage and at least a portion of the IC begins powering on;
- and
- a second digital circuitry separate from the first digital circuitry and configured to:
- concurrently with the at least a portion of the IC powering on, perform a logic built-in self-test (LBIST) for a third digital circuitry configured to monitor the voltage threshold comparator.
A method, comprising:
- configuring, by a first digital circuitry of an integrated circuit (IC), a voltage threshold comparator based on configuration data;
- based on the voltage threshold comparator being configured, enabling a voltage regulator such that the voltage regulator outputs a voltage and at least a portion of the IC begins powering on;
- and
- concurrently with the at least a portion of the IC powering on, performing a logic built-in self-test (LBIST) for a second digital circuitry configured to monitor the voltage threshold comparator.
An integrated circuit (IC), comprising:
- a voltage threshold comparator configured to monitor a voltage output by a voltage regulator;
- a first digital circuitry configured to:
- load configuration data from a memory;
- and
- based on validating the configuration data, enable the voltage regulator such that the voltage regulator outputs the voltage and the IC begins powering up;
- and
- a second digital circuitry separate from the first digital circuitry and configured to, concurrently with the IC powering up, perform a logic built-in self-test (LBIST) for a third digital circuitry configured to monitor the voltage threshold comparator.
Dependencies are inferred from the claim text.