Seagate ST500LX009, Product Manual

Page: 26 / 38

S
EAGATE
U
LTRA
M
OBILE
SSHD P
RODUCT
M
ANUAL
, R
EV
. D 21
S
ERIAL
ATA (SATA) I
NTERFACE
6.2 S
ERIAL
ATA D
EVICE
P
LUG
C
ONNECTOR
P
IN
D
EFINITIONS
Table 8
summarizes the signals on the Serial ATA interface and power connectors. Refer to the
Notes
below.
N
OTES
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.
4
All used voltage pins (V
x
) must be terminated.
Table 8 Serial ATA Connector Pin Definitions
S
EGMENT
P
IN
F
UNCTION
D
EFINITION
S
IGNAL
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