Intel C2338 FH8065501516761 Data Sheet
Product codes
FH8065501516761
Intel
®
Atom™ Processor C2000 Product Family for Microserver
September 2014
Datasheet, Vol. 2 of 3
Order Number: 330061-002US
253
Volume 2—SATA Controllers (SATA2, SATA3)—C2000 Product Family
Features
13.2.6
SATA Device Presence
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.
13.2.7
SATA LED
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.
Figure 13-2. Flow for Port Enable/Device Present Bits