Datasheet

SATA Controller Registers (D31:F5)
Intel® Xeon® Processor D-1500 Product Family 387
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
9.3.2.1 PxSSTS—Serial ATA Status Register (D31:F5)
Address Offset: Attribute: RO
Default Value: 00000000h Size: 32 bits
SDATA when SINDX.RIDX is 00h.
This is a 32-bit register that conveys the current state of the interface and host. Intel®
Xeon® Processor D-1500 Product Family updates it continuously and asynchronously.
When Intel® Xeon® Processor D-1500 Product Family transmits a COMRESET to the
device, this register is updated to its reset values.
Bit Description
31:0 Data (DATA)— R/W. This Data register is a “window” through which data is read or written to the
memory mapped registers. A read or write to this Data register triggers a corresponding read or
write to the memory mapped register pointed to by the Index register. The Index register must be
setup prior to the read or write to this Data register.
A physical register is not actually implemented as the data is actually stored in the memory mapped
registers.
Since this is not a physical register, the “default” value is the same as the default value of the
register pointed to by Index.
Bit Description
31:12 Reserved
11:8 Interface Power Management (IPM) — RO. Indicates the current interface state:
All other values reserved.
7:4 Current Interface Speed (SPD) — RO. Indicates the negotiated interface communication speed.
All other values reserved.
Intel® Xeon® Processor D-1500 Product Family Supports Gen 1 communication rates (1.5 Gb/s),
Gen 2 rates
(3.0 Gb/s) and Gen 3 rates (6.0 Gb/s).
3:0 Device Detection (DET) — RO. Indicates the interface device detection and Phy state:
All other values reserved.
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
Value Description
0h Device not present or communication not established
1h Generation 1 communication rate negotiated
2h Generation 2 communication rate negotiated
3h Generation 3 communication rate negotiated
Value Description
0h No device detected and Phy communication not established
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