Seagate ST9200420AS, ST980813ASG Serial ATA Sata interface, Serial ATA connector pin definitions

4.0Serial ATA (SATA) interface

These drives use the industry-standard Serial ATA interface that supports FIS data transfers. It supports ATA programmed input/output (PIO) modes 0–4; multiword DMA modes 0–2, and Ultra DMA modes 0–6. The drive also supports the use of the IORDY signal to provide reliable high-speed data transfers.

For detailed information about the Serial ATA interface, refer to the “Serial ATA: High Speed Serialized AT Attachment” specification.

4.1Hot-Plug compatibility

Momentus 7200.2 SATA drives incorporate connectors which enable you to hot plug these drives in accor- dance with the Serial ATA: High Speed Serialized AT Attachment specification revision 2.0. This specification can be downloaded from http://www.serialata.com.

4.2Serial ATA device plug connector pin definitions

Table 7 summarizes the signals on the Serial ATA interface and power connectors..

Table 7:	Serial ATA connector pin definitions
Segment	Pin	Function	Definition
	S1	Ground	2nd mate
	S2	A+	Differential signal pair A from Phy
	S3	A-
	S4	Ground	2nd mate
	S5	B-	Differential signal pair B from Phy
	S6	B+
Signal
	S7	Ground	2nd mate

Key and spacing separate signal and power segments

Momentus 7200.2 SATA Product Manual, Rev. E 23