Jasper Lake EDS Vol1

Datasheet

ID 633935
Date 01/01/2021
Public Content

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Document Table of Contents
DSP

SATA Device Presence

The flow used to indicate SATA device presence is shown in below figure. The ‘PxE’ bit refers to bits, depending on the port being checked and the ‘PxP’ bits refer to the bits, depending on the port being checked. If the PCS/PxP bit is set a device is present, if the bit is cleared a device is not present. If a port is disabled, software can check to view if a new device is connected by periodically re-enabling the port and observing if a device is present, if a device is not present it can disable the port and check again later. If a port remains enabled, software can periodically poll PCS.PxP to check if a new device is connected.

Port Enable/Device Present Bits Flow