公开(公告)号：US10809758B2

公开(公告)日：2020-10-20

申请号：US15926598

申请日：2018-03-20

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Bruce E. Duewer ,  Brad Allan Lambert ,  Michael A. Kost ,  Marc J. Kobayashi ,  David Hisky ,  Vitaliy Kulikov

IPC: G06F1/24 ,  G06F1/10 ,  G06F13/38 ,  G06F1/3215 ,  G06F1/12 ,  G06F13/42 ,  G06F1/3234 ,  G06F1/08

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.