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1. (WO2018200373) RECOVERY OF REFERENCE CLOCK ON A DEVICE

Pub. No.:    WO/2018/200373    International Application No.:    PCT/US2018/028845
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Tue Apr 24 01:59:59 CEST 2018
IPC: G06F 13/42
H04L 7/033
Applicants: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR, LTD.
DUEWER, Bruce E.
Inventors: LAMBERT, Brad Allan
KOST, Michael A.
KOBAYASHI, Marc J.
HISKY, David
KULIKOV, Vitaliy
Title: RECOVERY OF REFERENCE CLOCK ON A DEVICE
Abstract:
A device may include an input for receiving information communicated from a host to the device and a controller configured to recover a device reference clock on the device, the device reference clock proportional to a host reference clock of the host, when clock signaling from the host to the device is unavailable. The controller may recover the device reference clock by measuring a ratio between the host reference clock and the device reference clock of the device by monitoring, with the device, host start-of-frame markers communicated from the host to the device via the input, creating a recovered reference clock based on the measured ratio, and creating local start-of-frame markers that are phase locked with the host start-of-frame markers based on the recovered reference clock.