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US 12,597,933 B2Granted
Methods and apparatus to dynamically correct time keeping errors
AssigneeTexas Instruments Incorporated
InventorsRobin Hoel, Anuvrat Srivastava, Aniruddha P N, Anand Kumar G
Life of this patent
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Abstract
An example apparatus includes clock divider circuitry configured to divide a system clock by a pre-scaler input to generate a divided clock; counter circuitry configured to increment a system count based on the divided clock; comparison circuitry configured to determine a count difference between the system count and a real-time clock count; and controller circuitry configured to modify the pre-scaler input based on a comparison of the count difference to a threshold value.
Claims20
A circuit, comprising:
- a first circuit configured to:
- receive a first clock signal;
- and
- generate a second clock signal based on the first clock signal according to a pre-scaler value;
- a second circuit configured to generate a first count value based on the second clock signal;
- a third circuit configured to determine a difference between the first count value and a second count value that is generated based on a third clock signal;
- and
- a fourth circuit configured to modify the pre-scaler value based on the difference between the first count value and the second count value.
5 more elements
A method comprising:
- receiving, by a device, a first clock signal;
- generating, by the device, a second clock signal based on the first clock signal according to a pre-scaler value;
- generating, by the device, a first count value based on the second clock signal;
- determining, by the device, a difference between the first count value and a second count value;
- and
- modifying, by the device, the pre-scaler value based on the difference between the first count value and the second count value,
- wherein the device includes a switchable power domain and an always-on power domain, and wherein the first count value is generated in the switchable power domain and the second count value is generated in the always-on power domain.
4 more elements
Dependencies are inferred from the claim text.