Intel C2518 FH8065501516710 Data Sheet

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

September 2014

Datasheet, Vol. 2 of 3

Order Number: 330061-002US

253

The SATA PHY does know when a device is connected (if not in a partial or slumber 

state), and its beneficial to communicate this information to host software as this 

greatly reduces boot times and resume times.

The flow used to indicate SATA device presence is shown in 

. The PxE bit 

refers to PCS.P[1:0]E bits, depending on the port being checked and the PxP bits refer 

to the PCS.P[1:0]P 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, the 

software checks 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, the software disables the 

port and checks again later. If a port remains enabled, the software periodically polls 

PCS.PxP to verify if a new device is connected.

The SATA_LED# output is driven whenever the BSY bit is set in any SATA port. The 

SATA_LED# is an active-low, open-drain output. When SATA_LED# is low, the LED is 

active. When SATA_LED# is high, the LED is inactive.