Ambarella International LP

Hejia Yan

Xuan Wang

Praveen Kumar Jaini

Tianwei Liu

Guangjun He

Hsin-Wu Hsu

An apparatus comprising a battery and a circuit. The battery may be configured to provide a persistent power source. The circuit may comprise a processor, self-test logic, internal storage and logic circuitry. The self-test logic may be configured to perform a status check to determine an operating status of the logic circuitry. The processor may be configured to enable a first portion of the status check to be performed during a shutdown of the apparatus and a second portion of the status check to be performed during a bootup of the apparatus. The battery may provide the persistent power source to the internal storage after the shutdown of the apparatus. Parameters generated during the first portion may be stored in the internal storage. The parameters stored in the internal storage may be used with the second portion to determine the operating status of the logic circuitry.

Smart storage of shutdown LBIST status

An apparatus comprises a noisy bias voltage generator circuit, a random seed generator circuit, and a random series generator circuit. The noisy bias voltage generator circuit may be configured to generate a plurality of noisy bias voltages in response to a plurality of input voltage signals and a first bias current signal. The random seed generator circuit may be configured to generate a random seed in response to the plurality of noisy bias voltages and a second bias current signal. The random series generator circuit may be configured to generate a series of true random bits in response to the random seed and a clock signal.

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Sunnyvale, CA, United States of America

Hejia Yan