公开(公告)号：US20220121263A1

公开(公告)日：2022-04-21

申请号：US17561651

申请日：2021-12-23

Applicant: Intel Corporation

Inventor： Christopher P. MOZAK ,  Robert J. ROYER, Jr. ,  Aaron MARTIN ,  Alex P. THOMAS ,  Tomer LEVY ,  Noam LUPOVICH

IPC: G06F1/3237 ,  G06F1/3234

Abstract: In a memory subsystem, a memory controller can put its physical interface (PHY) into a low power state when an associated memory device is in self-refresh. Instead of powering on the interface and then triggering the memory device to exit self-refresh, or instead waiting for the physical interface to be powered up prior to waking the memory device from self-refresh, the memory controller can instruct the PHY to send a self-refresh exit command to the memory device and power up the physical interface in parallel with the memory device coming out of self-refresh. The memory controller can power down a high speed clock path of the PHY and use a slower clock path to send the self-refresh exit command before powering the high speed clock path back up.