Seagate ST9146852SS ユーザーズマニュアル
Savvio 15K.2 SAS Product Manual, Rev. E
61
Table 13:
SAS pin descriptions
Pin
Signal name
Signal type
Pin
Signal name
Signal type
S1
Port A Ground
P1*
NC (reserved 3.3Volts)
S2*
+Port A_in
Diff. input pair
P2*
NC (reserved 3.3Volts)
S3*
-Port A_in
P3
NC (reserved 3.3Volts)
S4
Port A Ground
P4
Ground
S5*
-Port A_out
Diff output pair
P5
Ground
S6*
+Port A_out
P6
Ground
S7
Port A Ground
P7
5 Volts charge
S8
Port B Ground
P8*
5 Volts
S9*
+Port B_in
Diff. input pair
P9*
5 Volts
S10
*
*
-Port B_in
P10
Ground
S11
Port A Ground
P11
*
*
Ready LED
Open collector out
S12
*
*
-Port B_out
Diff output pair
P12
Ground
S13
*
*
+Port B_out
P13
12 Volts charge
S14
Port B Ground
P14
*
*
12 Volts
P15
*
*
12 Volts
* - Short pin to support hot plugging
NC - No connection in the drive.
12.4.6
SAS transmitters and receivers
A typical SAS differential copper transmitter and receiver pair is shown in Figure 16. The receiver is AC cou-
pling to eliminate ground shift noise.
pling to eliminate ground shift noise.
Figure 16.
SAS transmitters and receivers
Receiver
Differential
Transfer Medium
.01
.01
100
100
Transmitter
RX
RY
TX
TY