5.2Serial ATA device plug connector pin definitions

Table 7 summarizes the signals on the Serial ATA interface and power connectors.

Table 7:

Serial ATA connector pin definitions

 

 

 

 

 

Segment

Pin

Function

 

Definition

 

 

 

 

 

 

S1

Ground

 

2nd mate

 

 

 

 

 

 

S2

A+

 

Differential signal pair A from Phy

 

 

 

 

 

 

S3

A-

 

 

 

 

 

 

 

 

S4

Ground

 

2nd mate

 

 

 

 

 

 

S5

B-

 

Differential signal pair B from Phy

 

 

 

 

 

 

S6

B+

 

 

Signal

 

 

 

 

S7

Ground

 

2nd mate

 

 

 

 

 

 

 

 

Key and spacing separate signal and power segments

 

 

 

 

 

 

P1

V33

 

3.3V power

 

P2

V33

 

3.3V power

 

P3

V33

 

3.3V power, pre-charge, 2nd mate

 

P4

Ground

 

1st mate

 

 

 

 

 

 

P5

Ground

 

2nd mate

 

 

 

 

 

 

P6

Ground

 

2nd mate

 

 

 

 

 

 

P7

V5

 

5V power, pre-charge, 2nd mate

Power

P8

V5

 

5V power

P9

V5

 

5V power

 

 

 

P10

Ground

 

2nd mate

 

 

 

 

 

 

P11

Reserved

 

The pin corresponding to P11 in the backplane receptacle connector is also reserved

 

 

 

 

The corresponding pin to be mated with P11 in the power cable receptacle connector

 

 

 

 

shall always be grounded

 

 

 

 

 

 

P12

Ground

 

1st mate.

 

 

 

 

 

 

P13

NC

 

Not connected

 

 

 

 

 

 

P14

NC

 

Not connected

 

 

 

 

 

 

P15

NC

 

Not connected

 

 

 

 

 

1.All pins are in a single row, with a 1.27 mm (0.050”) pitch.

2.The comments on the mating sequence apply to the case of backplane blindmate connector only. In this case, the mating sequences are:

the ground pins P4 and P12.

the pre-charge power pins and the other ground pins.

the signal pins and the rest of the power pins.

3.There are three power pins for each voltage. One pin from each voltage is used for pre-charge when installed in a blind-mate backplane configuration.

4.All used voltage pins (Vx) must be terminated.

Momentus Product Manual, Rev. C

23

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Image 29
Seagate ST9750424AS Serial ATA device plug connector pin definitions, Serial ATA connector pin definitions, Signal

ST9500428AS, ST9640422AS, ST9750423ASG, ST9750420AS, ST9750420ASG specifications

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