HGST Travelstar 7K500 BE, 320GB 0A79103 User Manual
Product codes
0A79103
7K500 OEM SPECIFICATION
Page 40 of 176
7.3
7.3
7.3
7.3 Signal definitions
Signal definitions
Signal definitions
Signal definitions
The pin assignments of interface signals are listed as follows:
No.
Plug Connector pin definition
Signal
I/O
S1
GND
2nd mate
Gnd
S2
A+
Differential signal A from Phy
RX+
Input
S3
A-
RX-
Input
Signal
S4
Gnd
2nd mate
Gnd
S5
B-
Differential signal B from Phy
TX-
Output
S6
B+
TX+
Output
S7
Gnd
2nd mate
Gnd
Key and spacing separate signal and power
segments
segments
P1
V33
3.3V power
3.3V
P2
V33
3.3V power
3.3V
P3
V33
3.3V power, pre-charge, 2nd Mate
3.3V
P4
Gnd
1st mate
Gnd
P5
Gnd
2nd mate
Gnd
P6
Gnd
2nd mate
Gnd
P7
V5
5V power,pre-charge,2nd Mate
5V
P8
V5
5V power
5V
Power
P9
V5
5V power
5V
P10
Gnd
2nd mate
Gnd
P11
DAS/DSS
Device Activity Signal / Disable Staggered
Spinup
Spinup
1
Note 1
P12
Gnd
1st mate
Gnd
P13
V12
12V power,pre-chage,2nd mate
V12
P14
V12
12V power
V12
P15
V12
12V power
V12
Table 23. Interface connector pins and I/O signals
Note 1;
Pin P11 is used by the drive to provide the host with an activity indication and by the host to
indicate whether staggered spin up should be used.
The signal the drive provides for activity indication is a low-voltage low-current driver.
If pin P11 is asserted low the drive shall disable staggered spin-up and immediately initiate spin up.
If pin P11 is not connected in the host (floating), the drive shall enable staggered spin up.
Pin P11 is used by the drive to provide the host with an activity indication and by the host to
indicate whether staggered spin up should be used.
The signal the drive provides for activity indication is a low-voltage low-current driver.
If pin P11 is asserted low the drive shall disable staggered spin-up and immediately initiate spin up.
If pin P11 is not connected in the host (floating), the drive shall enable staggered spin up.
7.3.1
7.3.1
7.3.1
7.3.1
TX+ / TX
TX+ / TX
TX+ / TX
TX+ / TX----
These signal are the outbound high-speed differential signals that are connected to the serial ATA
cable
cable
7.3.2
7.3.2
7.3.2
7.3.2
RX+ / RX
RX+ / RX
RX+ / RX
RX+ / RX----
These signals are the inbound high-speed differential signals that are connected to the serial ATA
cable.
cable.
The following standard shall be referenced about signal specifications.
Serial ATA International Organization: Serial ATA Revision 2.5