Apple Inc.
Inter-chip time synchronization

Abstract:

A device implementing an inter-chip time synchronization system may include a first circuit having a first clock and a second circuit having a second clock. The first circuit may be configured to capture a first timestamp from the first clock responsive to receiving a sampling signal from the second circuit. The first circuit may be configured to receive a second timestamp that was captured by the second circuit from a second clock of the second circuit. The second timestamp may have been captured by the second circuit when the sampling signal was transmitted to the first circuit. The first circuit may be configured to generate a conversion parameter for converting from the second clock of the second circuit to the first clock of the first circuit based at least in part on the first and second timestamps, and to store the generated conversion parameter.