307013-003 Datasheet, PDF (539/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

SATA Controller Registers (D31:F2) (Desktop and Mobile Only)
12.3.2.10 PxSSTS—Port [3:0] Serial ATA Status Register (D31:F2)
Address Offset:
Default Value:
Port 0: ABAR + 128h
Attribute:
Port 1: ABAR + 1A8h (Desktop Only)
Port 2: ABAR + 228h
Port 3: ABAR + 2A8h (Desktop Only)
00000000h
Size:
RO
32 bits
This is a 32-bit register that conveys the current state of the interface and host. The
ICH7 updates it continuously and asynchronously. When the ICH7 transmits a
COMRESET to the device, this register is updated to its reset values.
Bit
Description
31:12 Reserved
11:8
Interface Power Management (IPM) — RO. Indicates the current interface state:
Value Description
0h
Device not present or communication not established
1h
Interface in active state
2h
Interface in PARTIAL power management state
6h
Interface in SLUMBER power management state
All other values reserved.
Current Interface Speed (SPD) — RO. Indicates the negotiated interface
communication speed.
Value Description
0h
Device not present or communication not established
1h
Generation 1 communication rate negotiated
7:4
2h
Generation 2 communication rate negotiated
All other values reserved.
Intel^® ICH7 supports Generation 1 communication rates (1.5 Gb/sec) and Gen 2 rates
(3.0 Gb/s).
ICH7 Mobile SKUs support Generation 1 communication rates (1.5 Gb/sec).
Device Detection (DET) — RO. Indicates the interface device detection and Phy
state:
Value Description
0h
No device detected and Phy communication not established
3:0
1h
Device presence detected but Phy communication not established
3h
Device presence detected and Phy communication established
4h
Phy in offline mode as a result of the interface being disabled or
running in a BIST loopback mode
All other values reserved.
Intel ^® ICH7 Family Datasheet
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