PC Hardware in a Nutshell, 3rd Edition

SATA Connectors and Cables

SATA uses simplified connectors and cables. Connectors are keyed unambiguously. The 15-pin SATA Power Connector, shown in Table 13-7, and the seven-pin SATA Signal Connector, shown in Table 13-8, each use a single row of pins with 0.050 inch (1.27mm) spacing. SATA makes provision for hot-plugging using blind backplane connectors. The mating sequence for such connectors is shown in Table 13-7 and Table 13-8 in the Mating column. Connections for ground pins P4 and P12 are made first, connections for the precharge power pins and the remaining ground pins are made second, and connections for the signal pins and remaining power pins are made third.

Table 13-7. SATA Power Connector pin definitions

Pin	Signal	Usage	Mating
P1	V33	3.3 V power	Third
P2	V33	3.3 V power	Third
P3	V33	3.3 V power, precharge	Second
P4	Gnd	Ground	First
P5	Gnd	Ground	Second
P6	Gnd	Ground	Second
P7	V5	5 V power, precharge	Second
P8	V5	5 V power	Third
P9	V5	5 V power	Third
P10	Gnd	Ground	Second
P11	Reserved
P12	Gnd	Ground	First
P13	V12	12 V power, precharge	Second
P14	V12	12 V power	Third
P15	V12	12 V power	Third

Table 13-8. SATA Signal Connector pin definitions

Pin	Signal	Usage	Mating
S1	Gnd	Ground	Second
S2	A+	Differential signal pair A, positive	Third
S3	A-	Differential signal pair A, negative	Third
S4	Gnd	Ground	Second
S5	B-	Differential signal pair B, negative	Third
S6	B+	Differential ...