12.4.2Physical characteristics

This section defines physical interface connector.

12.4.3Connector requirements

Contact your preferred connector manufacturer for mating part information. Part numbers for SAS connectors will be provided in a future revision of this publication when production parts are available from major connec- tor manufacturers.

The SAS device connector is illustrated in Figures 14 and 15.

12.4.4Electrical description

SAS drives use the device connector for:

DC power

SAS interface

Activity LED

This connector is designed to either plug directly into a backpanel or accept cables.

12.4.5Pin descriptions

This section provides a pin-out of the SAS device and a description of the functions provided by the pins.

Table 13: SAS pin descriptions

Pin

Signal name

Signal type

 

 

 

 

 

 

S1

Port A Ground

 

 

 

 

S2*

+Port A_in

Diff. input pair

 

 

 

S3*

-Port A_in

 

 

 

 

S4

Port A Ground

 

 

 

 

S5*

-Port A_out

Diff output pair

 

 

 

S6*

+Port A_out

 

 

 

 

S7

Port A Ground

 

 

 

 

S8

Port B Ground

 

 

 

 

S9*

+Port B_in

Diff. input pair

 

 

 

S10*

-Port B_in

 

 

 

 

S11

Port A Ground

 

 

 

 

S12*

-Port B_out

Diff output pair

 

 

 

S13*

+Port B_out

 

 

 

 

S14

Port B Ground

 

 

 

 

 

 

 

*- Short pin to support hot plugging NC - No connection in the drive.

Pin

Signal name

Signal type

 

 

 

 

 

 

P1*

NC (reserved 3.3Volts)

 

 

 

 

P2*

NC (reserved 3.3Volts)

 

 

 

 

P3

NC (reserved 3.3Volts)

 

 

 

 

P4

Ground

 

 

 

 

P5

Ground

 

 

 

 

P6

Ground

 

 

 

 

P7

5 Volts charge

 

 

 

 

P8*

5 Volts

 

 

 

 

P9*

5 Volts

 

 

 

 

P10

Ground

 

 

 

 

P11*

Ready LED

Open collector out

 

 

 

P12

Ground

 

 

 

 

P13

12 Volts charge

 

 

 

 

P14*

12 Volts

 

 

 

 

P15*

12 Volts

 

 

 

 

66

Constellation.2 SAS Product Manual, Rev. H

Page 74
Image 74
Seagate ST91000642SS, 100620418 Physical characteristics, Connector requirements, Electrical description, Pin descriptions