EW31244SL7QV Datasheet, PDF (220/252 Pages) Intel Corporation – Intel® 31244 PCI-X to Serial ATA Controller

Intel^® 31244 PCI-X to Serial ATA Controller
Programming Interface
5.10.12 SU PCI DPA Mode Superset Registers
This section defines the Serial ATA Superset Registers. These registers provide control and status
of the Serial ATA bus, and also support new Serial ATA specific commands.
5.10.12.1 SU PCI DPA SATA SStatus Register - SUPDSSSR
Table 135.
The SU PCI DPA SATA SStatus is a read-only register. The SU PCI DPA SATA SStatus Register
provides status for the SATA interface itself, and conveys the interface state at the time it is read
and is updated continuously and asynchronously. The SU PCI DPA SATA SStatus Register is one
of the SCR Registers defined in the Serial ATA/High-Speed Serialized AT Attachment, Revision 1.0
RC-1.
SU PCI DPA SATA SStatus Register - SUPDSSSR (Sheet 1 of 2)
PCI
Attributes
31
28
24
20
16
12
8
4
0
rv rv rv rv rv rv rv rv rv rv rv rv rv rv rv rv rv rv rv rv ro ro ro ro ro ro ro ro ro ro ro ro
PCI IDE Mode BAR5 Offset
= 000H,
DPA Mode BAR0 DPA Mode Offset
Port 0 = 300H, Port 1 = 500H
Port 2 = 700H, Port 3 = 900H
Attribute Legend:
RV = Reserved
PR = Preserved
RS = Read/Set
RW = Read/Write
RC = Read Clear
RO = Read Only
NA = Not Accessible
Bit
31:12
11:08
07:04
Default
0000_0H
0000₂
0000₂
Description
Reserved
IPM - Interface Power Mode The IPM value indicates the current interface power management state
0000₂ - Device is not present or communication has not been established
0001₂ - Interface in active state
0010₂ - Interface in PARTIAL power management state
0110₂ - Interface in SLUMBER power management state
All other values are reserved.
The default value after reset is 0000₂. After communications between the host controller and the device
is established, the value will change to reset 0001₂.
SPD - The SPD value indicates the negotiated interface communication speed established
0000₂ - No negotiated speed because the device is not present or communication is not established
0001₂ - Generation 1 communication rate negotiated
All other values are reserved.
The default value after reset is 0000₂. After communications between the host controller and the device
is established, the value will change to reset 0001₂.
220
April 2004
Developer’s Manual