公开(公告)号：US10275163B2

公开(公告)日：2019-04-30

申请号：US15820727

申请日：2017-11-22

Applicant: Silicon Motion, Inc.

Inventor： Fu-Jen Shih ,  Yen-Hung Chen

IPC: G06F13/10 ,  G06F3/06 ,  G06F9/4401 ,  G06F13/42

Abstract: A host device coupled to a data storage device via a predetermined interface includes a processor and a signal processing device. The processor accesses data stored in the data storage device via the predetermined interface. The signal processing device performs signal processing on the data. The processor transmits a first power mode change request packet to the data storage device via the predetermined interface, to request to change a data transfer speed of the predetermined interface from a first speed to a second speed. The processor receives a first power mode change confirm packet via the predetermined interface from the data storage device, and in response to the first power mode change confirm packet, the processor determines to keep the data transfer speed at the first speed and does not change the data transfer speed to the second speed.

公开(公告)号：US10452122B2

公开(公告)日：2019-10-22

申请号：US15823328

申请日：2017-11-27

Applicant: Silicon Motion, Inc.

Inventor： Fu-Jen Shih ,  Yen-Hung Chen

IPC: G06F1/26 ,  G06F1/32 ,  G06F1/3234 ,  G06F1/3225 ,  G06F3/06 ,  G06F1/3296 ,  G06F13/16 ,  G06F13/28

Abstract: A data storage device coupled to a host device via a predetermined interface includes a memory device, an SRAM, and a controller. The controller is coupled to the memory device and the SRAM. The controller receives a first power mode change request packet requesting to change the data transfer speed of the predetermined interface from a first speed to a second speed via the predetermined interface from the host device, and in response to the first power mode change request packet, the controller determines whether the operation status of the data storage device is busy. When the operation status of the data storage device is busy, the controller determines to reject the request to change the data transfer speed and keeps the data transfer speed at the first speed and does not change the data transfer speed to the second speed.