![](http://pdfasset.owneriq.net/a/65/a6581f7d-d3d2-49d6-ba78-be7d4b867158/a6581f7d-d3d2-49d6-ba78-be7d4b867158-bg24.png)
26 Barracuda Serial ATA V Product Manual, Rev. B
4.1 Serial ATA device plug connector pin definitions
Table 6 summarizes the signals on the Serial ATA interface and power con-
nectors..
Table 6: 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 pari 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 Reserved 1. The pin corresponding to P11 in the back-
plane receptacle connector is also
reserved
2. The corresponding pin to be mated with
P11 in the power cable receptacle connec-
tor shall always be grounded
P12 Ground 1st mate.
P13 V
12
12V power, pre-charge, 2nd mate
P14 V
12
12V power
P15 V
12
12V power