公开(公告)号：US11720520B2

公开(公告)日：2023-08-08

申请号：US17535590

申请日：2021-11-25

Applicant: APPLE INC.

Inventor： John H Kelm ,  Alexei E Kosut ,  Yi Chun Chen

IPC: G06F13/42 ,  G06F1/12

CPC classification number: G06F13/4295 ,  G06F1/12 ,  G06F2213/0042

Abstract: An apparatus includes components, a distributed timebase circuit, an interface and a Time Synchronization Circuit (TSC). The timebase circuit is configured to provide local timebases in physical proximity to the components, and synchronize the local timebases to a global timebase so as to provide a consistent time measurement. The interface is configured to be coupled to one or more devices. Transmissions on the interface are logically divided into a plurality of frames. Time on the interface is defined based on a frame number identifying a particular frame. The TSC is configured to capture a first timestamp based on the frame number corresponding to a point in time on the interface, and to concurrently capture a second timestamp based on a local timebase corresponding to the point in time, wherein the first timestamp and the second timestamp correlate time on the interface to the consistent time measurement.

公开(公告)号：US20230082266A1

公开(公告)日：2023-03-16

申请号：US17535590

申请日：2021-11-25

Applicant: APPLE INC.

Inventor： John H Kelm ,  Alexei E Kosut ,  Yi Chun Chen

IPC: G06F13/42 ,  G06F1/12

Abstract: An apparatus includes components, a distributed timebase circuit, an interface and a Time Synchronization Circuit (TSC). The timebase circuit is configured to provide local timebases in physical proximity to the components, and synchronize the local timebases to a global timebase so as to provide a consistent time measurement. The interface is configured to be coupled to one or more devices. Transmissions on the interface are logically divided into a plurality of frames. Time on the interface is defined based on a frame number identifying a particular frame. The TSC is configured to capture a first timestamp based on the frame number corresponding to a point in time on the interface, and to concurrently capture a second timestamp based on a local timebase corresponding to the point in time, wherein the first timestamp and the second timestamp correlate time on the interface to the consistent time measurement.