NH82801HEM S LA5R Intel, NH82801HEM S LA5R Datasheet - Page 486

• Manufacturer Part Number: NH82801HEM S LA5R
• Manufacturer: Intel

Specifications of NH82801HEM S LA5R

• Lead Free Status / RoHS Status: Compliant

12.1.33
486
MAP—Address Map Register (SATA–D31:F2)
Address Offset: 90h
Default Value:
(Desktop
(Mobile
Only)
Only)
Bits
7:6
5:2
1:0
1:0
SATA Mode Select (SMS) — R/W: SW programs these bits to control the mode in
which the SATA HBA should operate:
00b = IDE mode
01b = AHCI mode
10b = RAID mode
11b = Reserved
NOTES:
1.
2.
3.
4.
5.
6.
7.
Reserved.
Map Value — R/W. Map Value (MV): Reserved
Map Value — R/W. Map Value (MV): The value in the bits below indicate the address
range the SATA ports responds to, and whether or not the PATA and SATA functions
are combined. When in combined mode, the AHCI memory space is not available and
AHCI may not be used.
00 =Non-combined. P0 is primary master, P2 is the primary slave. P1 is secondary
master, P3 is the secondary slave.
01 =Reserved
10 =Combined. P0 is primary master. P2 is primary slave. IDE is secondary
11 =Reserved
NOTES:
1.
2.
The SATA Function Device ID will change based on the value of this register.
When combined mode is used (MV = ‘10’), only IDE mode is allowed. IDE
mode can be selected when AHCI and/or RAID are enabled
When switching from AHCI or RAID mode to IDE mode, a 2 port SATA
controller (Device 31, Function 5) shall be enabled.
AHCI mode may only be selected when MV = 00
RAID mode may only be selected when MV = 00
Programming these bits with values that are invalid (e.g. selecting RAID when
in combined mode) will result in indeterministic behavior by the hardware.
Software shall not manipulate SMS during runtime operation (i.e., the OS will
not do this). The BIOS may choose to switch from one mode to another during
POST.
Programming these bits with values that are invalid (e.g., selecting RAID when
in combined mode) will result in indeterministic behavior by the hardware.
SW shall not manipulate MV during runtime operation; i.e. the OS will not do
this. The BIOS may choose to switch from one mode to another during POST.
00h
Description
Attribute:
Size:
SATA Controller Registers (D31:F2)
R/W
8 bits
Intel
®
ICH8 Family Datasheet