Seagate ST973451SS ユーザーズマニュアル
58
Savvio 15K SAS Product Manual, Rev. B
Table 13:
SAS pin descriptions
* - Short pin to support hot plugging
NC - No connection in the drive.
9.4.6
SAS transmitters and receivers
A typical SAS differential copper transmitter and receiver pair is shown in Figure 15. The receiver is AC cou-
pling to eliminate ground shift noise.
pling to eliminate ground shift noise.
Figure 15.
SAS transmitters and receivers
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
Receiver
Differential
Transfer Medium
.01
.01
100
100
Transmitter
RX
RY
TX
TY