Invention Grant
- Patent Title: Precise time management using local time base
-
Application No.: US17472242Application Date: 2021-09-10
-
Publication No.: US11683149B2Publication Date: 2023-06-20
- Inventor: Christopher D. Finan , Alexander Ukanwa , Charles F. Dominguez , Jean-Didier Allegrucci , Jeffrey J. Irwin , Kalpana Bansal , Michael Bekerman , Remi Clavel
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Kowert, Hood, Munyon, Rankin & Goetzel, P.C.
- Agent Erik A. Heter; Dean M. Munyon
- Main IPC: G06F1/12
- IPC: G06F1/12 ; H04L7/00

Abstract:
A method and apparatus for synchronizing a timebase is disclosed. A timebase management circuit includes limit circuitry, in a first clock domain, which generates, based on a global timebase, an initial timebase limit. The timebase management circuit includes, in a second clock domain, adjustment circuitry that generates an adjusted timebase limit based on the initial timebase limit. A storage circuit in the second clock domain stores a local timebase. Update circuitry, coupled to an output of the storage circuit, generates an updated local timebase using a clock signal in the second clock domain, wherein the updated local timebase is subject to the adjusted timebase limit.
Public/Granted literature
- US20220085969A1 Precise Time Management Using Local Time Base Public/Granted day:2022-03-17
Information query