Seagate ST400FM0073 ユーザーズマニュアル

Seagate 1200 SSD Product Manual, Rev. C

  75

  

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.

A typical SAS differential copper transmitter and receiver pair is shown in Figure 27. The receiver is AC coupling to eliminate 

ground shift noise.