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Savvio SAS Product Manual, Rev. D
Table 23: 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 18. The receiver is AC cou-
pling to eliminate ground shift noise.
Figure 18. 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
100100
Transmitter
RX
RY
TX
TY