Seagate Surveillance HDD Product Manual, Rev. C
20
www.seagate.com
SATA Interface
4.0
SATA Interface
These drives use the industry-standard Serial ATA (SATA) interface that supports FIS data transfers. It supports ATA
programmed input/output (PIO) modes 0 to 4; multiword DMA modes 0 to 2, and Ultra DMA modes 0 to 6.
For detailed information about the SATA interface, refer to the “Serial ATA: High Speed Serialized AT Attachment”
specification.
4.1
Hot-Plug compatibility
Seagate Surveillance HDD drives incorporate connectors which enable users to hot plug these drives in accordance with
the SATA Revision 3.0 specification. This specification can be downloaded from www.serialata.org.
4.2
SATA device plug connector pin definitions
Table 5
summarizes the signals on the SATA interface and power connectors.
Notes
1.
All pins are in a single row, with a 1.27 mm (0.050 in) pitch.
2.
The comments on the mating sequence apply to the case of backplane blindmate connector only. In this case, the
mating sequences are:
• the ground pins P4 and P12.
• the pre-charge power pins and the other ground pins.
• the signal pins and the rest of the power pins.
3.
There are three power pins for each voltage. One pin from each voltage is used for pre-charge when installed in a
blind-mate backplane configuration.
• All used voltage pins (V
x
) must be terminated.
Table 5
SATA 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
V
33
3.3V power
P2
V
33
3.3V power
P3
V
33
3.3V power, pre-charge, 2nd mate
P4
Ground
1st mate
P5
Ground
2nd mate
P6
Ground
2nd mate
P7
V
5
5V power, pre-charge, 2nd mate
P8
V
5
5V power
P9
V
5
5V power
P10
Ground
2nd mate
P11
Ground or LED signal
If grounded, drive does not use deferred spin
P12
Ground
1st mate.
P13
V
12
12V power, pre-charge, 2nd mate
P14
V
12
12V power
P15
V
12
12V power
