Seagate Exos 2X18 SATA Product Manual, Rev. A
24
www.seagate.com
Serial ATA (SATA) interface
4.0
Serial ATA (SATA) interface
These drives use the industry-standard Serial ATA interface that supports FIS data transfers. It supports ATA
programmed input/output (PIO) modes 0–4; multiword DMA modes 0–2, and Ultra DMA modes 0–6.
For detailed information about the Serial ATA interface, refer to the “Serial ATA: High Speed Serialized AT Attachment”
specification.
4.1
Hot-Plug compatibility
Exos 2X18 SATA drives incorporate connectors which enable users to hot plug these drives in accordance with the
Serial ATA Revision 3.3 specification. This specification can be downloaded from
.
Caution
:
The drive motor must come to a complete stop
(Ready to spindle stop time indicated in
)
prior to changing the plane of operation. This time is required to insure data integrity.
4.2
Serial ATA device plug connector pin definitions
summarizes the signals on the Serial ATA interface and power connectors.
Table 9 Serial ATA connector pin definitions
Segment
Pin
Function
Definition
Signal
S1
Ground
2nd mate
S2
A+
Differential signal pair A from Phy
S3
A-
S4
Ground
2nd mate
S5
B-
Differential signal pair B from Phy
S6
B+
S7
Ground
2nd mate
Key and spacing separate signal and power segments
Power
P1
V33
3.3V power
P2
V33
3.3V power
P3
V33
3.3V power, pre-charge, 2nd mate
P4
Ground
1st mate
P5
Ground
2nd mate
P6
Ground
2nd mate
P7
V5
5V power, pre-charge, 2nd mate
P8
V5
5V power
P9
V5
5V power
P10
Ground
2nd mate
P11
Ground or LED signal
If grounded, drive does not use deferred spin
P12
Ground
1st mate.
P13
V12
12V power, pre-charge, 2nd mate
P14
V12
12V power
P15
V12
12V power