NH82801FBM S L89K Intel, NH82801FBM S L89K Datasheet - Page 497
NH82801FBM S L89K
Manufacturer Part Number
NH82801FBM S L89K
Description
Manufacturer
Intel
Datasheet
1.NH82801FBM_S_L89K.pdf
(786 pages)
Specifications of NH82801FBM S L89K
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12.3.2.7
Intel
®
I/O Controller Hub 6 (ICH6) Family Datasheet
PxCMD—Port [3:0] Command Register (D31:F2)
Address Offset:
Default Value:
31:28
23:20
Bit
27
26
25
24
Interface Communication Control (ICC) — R/W . This is a four bit field which can be used to
control reset and power states of the interface. Writes to this field will cause actions on the interface,
either as primitives or an OOB sequence, and the resulting status of the interface will be reported in
the PxSSTS register (Address offset Port 0:ABAR+124h, Port 1: ABAR+1A4h, Port 2: ABAR+224h,
Port 3: ABAR+2A4h).
When system software writes a non-reserved value other than No-Op (0h), the ICH6 will perform the
action and update this field back to Idle (0h).
If software writes to this field to change the state to a state the link is already in (e.g. interface is in
the active state and a request is made to go to the active state), the ICH6 will take no action and
return this field to Idle.
NOTE: When the ALPE bit (bit 26) is set, then this register should not be set to 02h or 06h.
Aggressive Slumber / Partial (ASP) — R/W . When set, and the ALPE bit (bit 26) is set, the ICH6
will aggressively enter the slumber state when it clears the PxCI register and the PxSACT register is
cleared. When cleared, and the ALPE bit is set, the ICH6 will aggressively enter the partial state
when it clears the PxCI register and the PxSACT register is cleared.
Aggressive Link Power Management Enable (ALPE) — R/W . When set, the ICH6 will
aggressively enter a lower link power state (partial or slumber) based upon the setting of the ASP bit
(bit 27).
Drive LED on ATAPI Enable (DLAE) — R/W . When set, the ICH6 will drive the LED pin active for
ATAPI commands (PxCLB[CHz.A] set) in addition to ATA commands. When cleared, the ICH6 will
only drive the LED pin active for ATA commands. See
HDevice is ATAPI (ATAPI) — R/W. When set, the connected device is an ATAPI device. This bit is
used by the ICH6 to control whether or not to generate the desktop LED when commands are
active. See
Reserved
Fh–7h
5h–3h
Value
6h
2h
1h
0h
Port 0: ABAR + 118h
Port 1: ABAR + 198h (Desktop Only)
Port 2: ABAR + 218h
Port 3: ABAR + 298h (Desktop Only)
0000w00wh
where w = 00?0b (for ?, see bit description)
Section 5.17.5
Definition
Reserved
Slumber: This will cause the Intel
the slumber state. The SATA device may reject the request and the interface will
remain in its current state
Reserved
Partial: This will cause the ICH6 to request a transition of the interface to the partial
state. The SATA device may reject the request and the interface will remain in its
current state.
Active: This will cause the ICH6 to request a transition of the interface into the
active
No-Op / Idle: When software reads this value, it indicates the ICH6 is not in the
process of changing the interface state or sending a device reset, and a new link
command may be issued.
for details on the activity LED.
Description
Attribute:
Size:
®
ICH6 to request a transition of the interface to
SATA Controller Registers (D31:F2)
Section 5.17.5
R/W, RO, R/WO
32 bits
for details on the activity LED.
497
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