NH82801HEM S LB9B Intel, NH82801HEM S LB9B Datasheet - Page 554
NH82801HEM S LB9B
Manufacturer Part Number
NH82801HEM S LB9B
Description
Manufacturer
Intel
Datasheet
1.NH82801HEM_S_LB9B.pdf
(890 pages)
Specifications of NH82801HEM S LB9B
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13.1.30
554
PCS—Port Control and Status Register (SATA–D31:F5)
Address Offset: 92h
Default Value:
By default, the SATA ports are set to the disabled state (bits [5:0] = ‘0’). When enabled
by software, the ports can transition between the on, partial, and slumber states and
can detect devices. When disabled, the port is in the “off” state and cannot detect any
devices.
If an AHCI-aware or RAID enabled operating system is being booted then system BIOS
shall insure that all supported SATA ports are enabled prior to passing control to the
OS. Once the AHCI aware OS is booted it becomes the enabling/disabling policy owner
for the individual SATA ports. This is accomplished by manipulating a port’s PxSCTL and
PxCMD fields. Because an AHCI or RAID aware OS will typically not have knowledge of
the PxE bits and because the PxE bits act as master on/off switches for the ports, pre-
boot software must insure that these bits are set to ‘1’ prior to booting the OS,
regardless as to whether or not a device is currently on the port.
15:10
Bits
7:2
9
8
1
0
Reserved
Port 1 Present (P1P) — RO. The status of this bit may change at any time. This bit is
cleared when the port is disabled via P1E. This bit is not cleared upon surprise removal
of a device.
0 = No device detected.
1 = The presence of a device on Port 1 has been detected.
Port 0 Present (P0P) — RO. The status of this bit may change at any time. This bit is
cleared when the port is disabled via P0E. This bit is not cleared upon surprise removal
of a device.
0 = No device detected.
1 = The presence of a device on Port 0 has been detected.
Reserved
Port 1 Enabled (P1E) — R/W.
0 = Disabled. The port is in the ‘off’ state and cannot detect any devices.
1 = Enabled. The port can transition between the on, partial, and slumber states and
Port 0 Enabled (P0E) — R/W.
0 = Disabled. The port is in the ‘off’ state and cannot detect any devices.
1 = Enabled. The port can transition between the on, partial, and slumber states and
can detect devices.
can detect devices.
0000h
–
93h
Description
Attribute:
Size:
SATA Controller Registers (D31:F5)
R/W, R/WC, RO
16 bits
Intel
®
ICH8 Family Datasheet
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