Seagate ST120HM001 Seagate 600 SSD Product Manual - Page 25
Table 7, 8 SATA Connector Plug Pinout
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Table 7 summarizes the 1.8" drive Signal and Power SATA Plug. Table 7 1.8" SATA Connector Plug Pinout Segment Signal Power Pin Function Definition S1 GND Ground S2 A+ Differential Signal Pair (Host to Drive) S3 A- S4 GND Ground S5 B- Differential Signal Pair (Drive to Host) S6 B+ S7 GND Ground Spacing separates signal and power segments P1 V33 Unused [2] P2 V33 P3 GND Ground [1] P4 GND P5 V5 5V power to Drive P6 V5 P7 LED Signal Activity LED: Driven low to light Key Key Keyway P8 Optional Reserved for Seagate use. P9 Optional Leave unconnected. Notes: [1] Ground pins 3 and 4 mate first on micro SATA backplane connectors [2] The two V33 pins are unused but connected together on the drive. They can be used for a drive-in-place detection. SEAGATE 600 SSD PRODUCT MANUAL, REV. B 21