Seagate Barracuda 9LP FC Installation Manual page 28

26
Pin/contact
26
27*
28*
29
30*
31*
32
33*
34*
35
36
37
38
39
40
*Short pins in mating backpanel connector.
[1] This pin may be connected to external logic to detect the presence of the drive.
The drive connects this pin to the common ground.
Barracuda 9LP FC Installation Guide, Rev. A
Signal name
Ground
+Port B_in
–Port B_in
Ground
+Port A_out
–Port A_out
Ground
+Port B_out
–Port B_out
Ground
SEL_2
SEL_1
SEL_0
Reserved NC
5 Volts charge
Signal type
Diff. PECL input pair
Diff. PECL output pair
Diff. PECL output pair
TTL input/output
TTL input/output
TTL input/output