Invention Grant
- Patent Title: Clock synchronization across an interface with an intermittent clock signal
- Patent Title (中): 时钟同步跨接口与间歇时钟信号
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Application No.: US13095607Application Date: 2011-04-27
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Publication No.: US08745430B2Publication Date: 2014-06-03
- Inventor: William P. Cornelius , William O. Ferry , Girault W. Jones
- Applicant: William P. Cornelius , William O. Ferry , Girault W. Jones
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Park, Vaughan, Fleming & Dowler LLP
- Agent Chia-Hsin Suen
- Main IPC: G06F1/12
- IPC: G06F1/12 ; G06F1/04

Abstract:
The disclosed embodiments provide a system that facilitates synchronization between a first component and a second component connected to the first component via an interface in a computer system. During an active state of the interface, the system uses a local time base in the second component to generate a local clock signal that tracks a host clock signal from the first component. Next, during an inactive state of the interface, the system uses the local time base to maintain the local clock signal at the second component. Finally, during a subsequent active state of the interface after the inactive state, the system adjusts the local clock signal to remove clock drift between the local clock signal and the host clock signal.
Public/Granted literature
- US20120278645A1 CLOCK SYNCHRONIZATION ACROSS AN INTERFACE WITH AN INTERMITTENT CLOCK SIGNAL Public/Granted day:2012-11-01
Information query