Clock trim mechanism for onboard system clock
First Claim
1. An integrated circuit, comprising a processor, an onboard system clock for generating a clock signal, and clock trim circuitry, the integrated circuit being configured to:
- (a) receive an external signal;
(b) determine either the number of cycles of the clock signal during a predetermined number of cycles of the external signal, or the number of cycles of the external signal during a predetermined number of cycles of the clock signal;
(c) output the result of the determination of step (b) to an external source;
(d) receive a trim value from the external source;
(e) store the trim value in the integrated circuit, the trim value having been determined on the basis of the determined number of cycles;
(f) use the trim value to control the internal clock frequency.
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Accused Products
Abstract
An integrated circuit, comprising a processor, an onboard system clock for generating a clock signal, and clock trim circuitry, the integrated circuit being configured to: (a) receive an external signal; (b) determine either the number of cycles of the clock signal during a predetermined number of cycles of the external signal, or the number of cycles of the external signal during a predetermined number of cycles of the clock signal; (c) store a trim value in the integrated circuit, the trim value having been determined on the basis of the determined number of cycles; and (d) use the trim value to control the internal clock frequency.
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Citations
16 Claims
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1. An integrated circuit, comprising a processor, an onboard system clock for generating a clock signal, and clock trim circuitry, the integrated circuit being configured to:
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(a) receive an external signal; (b) determine either the number of cycles of the clock signal during a predetermined number of cycles of the external signal, or the number of cycles of the external signal during a predetermined number of cycles of the clock signal; (c) output the result of the determination of step (b) to an external source; (d) receive a trim value from the external source; (e) store the trim value in the integrated circuit, the trim value having been determined on the basis of the determined number of cycles; (f) use the trim value to control the internal clock frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification