Datasheet

7K500 OEM SPECIFICATION
Page 40 of 176
7.3
7.37.3
7.3 Signal definitions
Signal definitionsSignal 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
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 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.
7.3.1
7.3.17.3.1
7.3.1 TX+ / TX
TX+ / TXTX+ / TX
TX+ / TX-
--
-
These signal are the outbound high-speed differential signals that are connected to the serial ATA
cable
7.3.2
7.3.27.3.2
7.3.2 RX+ / RX
RX+ / RXRX+ / RX
RX+ / RX-
--
-
These signals are the inbound high-speed differential signals that are connected to the serial ATA
cable.
The following standard shall be referenced about signal specifications.
Serial ATA International Organization: Serial ATA Revision 2.5