Seagate ST920814AM, ST940813AM, ST940814AM, ST930814AM ATA interface signals and connector pins

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4.0ATA interface

These drives use the industry-standard ATA task file interface that supports 16-bit data transfers. It supports ATA programmed input/output (PIO) modes 0–4; multiword DMA modes 0–2, and Ultra DMA modes 0–5. The drive also supports the use of the IORDY signal to provide reliable high-speed data transfers.

For detailed information about the ATA interface, refer to the AT Attachment - 6 with Packet Interface (ATA/ ATAPI-6), ANSI NCITS 361-200,subsequently referred to as the ATA-6 Standard.

4.1ATA interface signals and connector pins

The following table summarizes the signals on the 44-pin ATA interface connector. For a detailed description of these signals, refer to the ATA-6 Standard.

	Signal Name	Connector	Cable
	Signal Name	Contact	Conductor
		Contact	Conductor

	RESET-	1	1

	DD7	3	3

	DD6	5	5

	DD5	7	7

	DD4	9	9

	DD3	11	11

	DD2	13	13

	DD1	15	15

	DD0	17	17

	Ground	19	19

	DMARQ	21	21

	DIOW-	23	23

	DIOR-	25	25

	IORDY	27	27

	DMACK-	29	29

	INTRQ	31	31

	DA1	33	33

	DA0	35	35

	CS1FX-	37	37

	DASP-	39	39

	+5 V (Logic)	41	41

	Ground (Return)	43	43

	Cable	Connector	Signal Name
	Conductor	Contact	Signal Name
	Conductor	Contact

	2	2	Ground

	4	4	DD8

	6	6	DD9

	8	8	DD10

	10	10	DD11

	12	12	DD12

	14	14	DD13

	16	16	DD14

	18	18	DD15

	20	20	(keypin)

	22	22	Ground

	24	24	Ground

	26	26	Ground

	28	28	PSYNC:CSEL

	30	30	Ground

	32	32	IOCS16-

	34	34	PDIAG-

	36	36	DA2

	38	38	CS3FX-

	40	40	Ground

	42	42	+5V (Motor)

	44	44	No connection

EE25 Series Product Manual, Rev. E

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Contents EE25 Series Page Contents EE25 Series Product Manual, Rev. E List of Figures EE25 Series Product Manual, Rev. E Introduction EE25 Series Product Manual, Rev. E Specification summary Drive specificationsAftermarket Specifications for 40 and 30 Gbyte modelsVibration, nonoperating Drive specification ST920813AM ST920814AM Specifications for 20 Gbyte modelsEE25 Series Product Manual, Rev. E LBA mode Default logical geometryFormatted capacity Physical organizationTechnology Specification Physical characteristicsRecording and interface technology Seek timeStart/stop times Read seek times vs temperature 85C 25C 20C 30CMsec Typical Max 85C 25C 20C 30CPower specifications Voltage tolerance Typical current profileConducted noise Active mode Power-management modesIdle mode Sleep modeAltitude Environmental specificationsNonoperating shock ShockOperating shock Acoustics Acoustic mode Idle Normal Seek Performance SeekVibration Operating vibrationElectromagnetic immunity Measurement type SpecificationReliability Test Description Performance Reference Level StandardAgency certification European Union Restriction of Hazardous Substances RoHS Environmental protectionCorrosive environment Page Handling and static discharge precautions Configuring and mounting the driveJumper settings Master/slave configurationCable-select option Drive mountingSignal Name Connector Cable Contact Conductor ATA interface signals and connector pinsCable Connector Signal Name Conductor Contact ATA interfaceCommand name Command code in hex ATA-standard commands Supported ATA commandsATA-standard security commands Command name Command code in hexATA-standard power-management commands Word Description Value Identify Device commandXx07H Bit Word Description if bit is set to Bit Word0CH Set Features commandEE25 Series Product Manual, Rev. E Internet Seagate Technology support servicesPresales Support Technical SupportData Recovery Services Call Center Toll-free Direct dial Warranty ServiceData Recovery Services Authorized Service Centers Numerics IndexPage Page EE25 Series Product Manual, Rev. E Page Seagate Technology LLC