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6.1.2 Signal definition
SATA has receivers and drivers to be connected to Tx+/- and Rx +/- Serial data signal.
Defines the signal names of I/O connector pin and signal name.
Table 8 Interface connector pins and I/O signals
No.
Plug Connector pin definition
Signal
I/O
Signal
S1
GND
2nd mate
Gnd
S2
A+
Differential signal A from Phy
RX+
Input
S3
A-
RX-
Input
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
P1
Reserved*
NOT USED (P1 and P2 tied internally)
Reserve
P2
Reserved*
Not USED (P1 and P2 tied internally)
Reserve
Not USED (P1, P2 and P3 tied internally)
Reserve
P3
Reserved* or
PWDIS* (option)
or
Enter/Exit Power Disable (option)
or
PWDIS
Power
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
P9
V5
5V power
5V
P10
Gnd
2nd mate
Gnd
P11
Reserved
Support staggered spin-up and LED activity
VDih max=2.1V
Reserve
P12
Gnd
1st mate
Gnd
P13
V12
12V power,pre-chage,2nd mate
V12
P14
V12
12V power
V12
P15
V12
12V power
V12
* SATA Specification Revision 3.1 and prior revisions assigned 3.3V to pins P1, P2 and P3. In addition, device plug
pins P1, P2, and P3 were required to be bused together. In the standard configuration of this product,
P3 is connected with P1 and P2 and this product behaves as SATA 3.1 or prior version product in a system
designed to SATA 3.2 system that does not support the 3.3 feature. For product with the optional SATA 3.3 Power
Disable Feature supported, P3 is now assigned as the POWER DISABLE CONTROL PIN. If P3 is driven HIGH
(2.1V-3.6V max), power to the drive circuitry will be disabled. Drives with this optional feature WILL NOT POWER
UP in systems designed to SATA Spec Revision 3.1 or earlier because P3 driven HIGH will prevent the drive from
powering up.
6.1.2.1 TX+ / TX-
These signals are the outbound high-speed differential signals that are connected to the serial ATA cable.
6.1.2.2 RX+ / RX-
These signals are the inbound high-speed differential signals that are connected to the serial ATA cable.
27
Hard Disk Drive Specification