SATA Cable pin configuration

SATA pin configuration

Pin Function Pin Function
1 Ground 2 A+ = Transmit (+)
3 A- = Transmit (-) 4 Ground
5 B- = Receive (-) 6 B+ = Receive (-)
7 Ground

Note: Transmit and Recieve designators are relative to the motherboard. Designations are reversed for each connected device.

The two (+/-) transmit leads and the two (+/-) receive leads are both twisted pair lines.