S
EAGATE
1200 SSD P
RODUCT
M
ANUAL
, R
EV
. A
69
Table 24
Micro SAS pin descriptions
P
IN
S
IGNAL NAME
S
IGNAL TYPE
P
IN
S
IGNAL NAME
S
IGNAL TYPE
S1
Port A Ground
P1*
3.3 Volts
S2*
+Port A_in
Diff. input pair
P2
3.3 Volts charge
S3*
-Port A_in
P3
Ground
S4
Port A Ground
P4
Ground
S5*
-Port A_out
Diff output pair
P5
5 Volts charge
S6*
+Port A_out
P6*
5 Volts
S7
Port A Ground
P7*
Reserved
S8
Port B Ground
P8*
NC (reserved for Manufacturing diagnostic)
S9*
+Port B_in
Diff. input pair
P9*
NC (reserved for Manufacturing diagnostic)
S10*
-Port B_in
S11
Port B Ground
A1*
Vendor specific
S12*
-Port B_out
Diff output pair
A2*
Vendor specific
S13*
+Port B_out
S14
Port B Ground
* - Short pin to support hot plugging
NC - No connection in the drive.
11.4.6 SAS transmitters and receivers
A typical SAS differential copper transmitter and receiver pair is shown in Figure 27. The receiver is AC coupling to eliminate
ground shift noise.
Figure 27. SAS transmitters and receivers
