Product specifications

VT8237R Data Sheet
Revision 2.06 December 15, 2004 -61- Device 15 Function 0 Serial ATA Controller Registers
SATA I/O Registers
The base address for access of these registers is specified in
Rx27-24.
I/O Offset 3-0 – SATA Status............................................RO
31-12 Fixed at 0 ...........................................always reads 0
11-8 IPM
Indicates the current interface power management.
0000 Device not present or communication not
established
0001 Interface in active state
0010 Interface in PARTIAL power mgmt state
0110 Interface in SLUMBER power mgmt state
7-4 SPD
Indicates the negotiated interface communication
speed established.
0000 No negotiated speed (device not present or
communication not established)
0001 Generation 1 communication rate negotiated
3-0 DET
Indicates the interface device detection and PHY
state.
0000 No device detected and PHY communication
not established
0001 Device presence detected but PHY
communication not established
0011 Device presence detected and PHY
communication established
0100 PHY in offline mode as a result of interface
disabled or running in a BIST loopback mode
Offset 7-4 – SATA Error (00000000h)..........................RWC
31-26 Reserved ............................................. always reads 0
25 Unrecognized FIS Type ........................... default = 0
24 Transport State Transition Error .......... default = 0
23 Link Sequence Error ............................... default = 0
22 Handshake Error ..................................... default = 0
21 CRC Error................................................ default = 0
20 Disparity Error ........................................ default = 0
19 10B to 8B Decode Error .......................... default = 0
18 Comm Wake Detected ............................. default = 0
17 PHY Internal Error ................................. default = 0
16 PHY Ready Change................................. default = 0
15-12 Reserved ............................................always reads 0
11 Internal Error .......................................... default = 0
10 Protocol Error.......................................... default = 0
9 Non-recovered Persistent Communication or Data
Integrity Error ......................................... default = 0
8 Non-recovered Transient Data Integrity Error
.............................................................. default = 0
7-2 Reserved ............................................always reads 0
1 Recovered Communications Error ........ default = 0
0 Recovered Data Integrity Error ............. default = 0
Offset B-8 – SATA Control (00000310h)......................... RO
31-12 Reserved..............................................always reads 0
11-18 IPM
Represents the enabled interface power management
states that can be invoked via SATA interface power
management capabilities.
0000 No interface power mgmt state restrictions
0001 Transitions to the PARTIAL power mgmt state
disabled
0010 Transitions to the SLUMBER power mgmt
state disabled
0011 Transitions to both the PARTIAL and
SLUMBER power mgmt states disabled.....def
All other values are reserved.
7-4 SPD
Represents the maximum communication speed that
the interface is allowed.
0000 No speed negotiation restrictions
0001 Limit speed negotiation to a rate not greater
than Generation 1 communication rate........ def
All other values are reserved.
3-0 DET
Controls the host adapter device detection and
interface initialization.
0000 No device detection or initialization action
requested......................................................def
0001 Perform interface communication initialization
sequence to establish communication
0100 Disable the SATA interface and put PHY in
offline mode
All other values are reserved.