Seagate ST3160021AS, ST3120827AS manual Additional details, Conducted noise, Voltage tolerance

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cessful exchange of Out-Of-Band (OOB) signals with a functional host-side Serial ATA port. In desktop systems, SATA transceivers should initialize OOB as soon as power comes ready to guarantee the drive spins up quickly. Seagate disc drives will not spin up without an operational host-side Serial ATA transceiver.

Additional details

Upon system power up, PHY communication is initiated with a COMRESET signal, which is generated by the host-side transceiver. COMRESET is followed by a COMINIT signal generated by the disc drive transceiver. COMRESET and COMINIT are followed by an exchange of COMWAKE signals and Align primitives. The disc drive will spin up after the successful exchange of Align primitives cause the PHY to come ready.

For more details, refer to:

•Section 6.8 of the Serial ATA 1.0 High-Speed Serialized AT Attachment specification

•Section 6.2 of the Serial ATA II: Extensions to Serial ATA 1.0 specification

•SATA 1.0 design guides

Note. These specifications and guides are available on the Serial ATA web site (www.serialata.org).

2.8.3Conducted noise

Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on the +12 volt line or an equivalent 15-ohm resistive load on the +5 volt line.

•Using 12-volt power, the drive is expected to operate with a maximum of 120 mV peak-to-peak square-wave injected noise at up to 10 MHz.

•Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave injected noise at up to 10 MHz.

Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.

2.8.4Voltage tolerance

Voltage tolerance (including noise):

5V ± 5%

12V ± 10%

10	Barracuda 7200.7 Serial ATA Product Manual, Rev. N

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Contents Barracuda 7200.7 Serial ATA Page Barracuda 7200.7 Serial ATA Page Contents Barracuda 7200.7 Serial ATA Product Manual, Rev. N List of Figures Page Introduction Native Command Queuing About the Serial ATA interfaceDrive specifications Specification summary tableSystem will display the warranty information for your drive Formatted capacity Default logical geometryLBA mode Cylinders Read/write heads Sectors per track 16,383Physical organization Physical characteristicsDrive specification Recording and interface technologyPower specifications Seek timeStart/stop times Operating power and current Idle mode powerStandby mode Typical current profiles Deferred spinupAdditional details Conducted noiseVoltage tolerance Environmental specifications Humidity Relative humidity Temperature gradientWet bulb temperature AltitudeOperating vibration AcousticsVibration Nonoperating vibrationRadio frequency environments Electromagnetic immunityReliability Test Description Performance level Reference standardElectromagnetic compatibility Safety certificationAgency certification Korean RRLAustralian C-Tick N176 FCC verificationEnvironmental protection Corrosive environmentEuropean Union Restriction of Hazardous Substances RoHS Barracuda 7200.7 Serial ATA Product Manual, Rev. N Configuring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsDrive mounting Mounting dimensions-top, side and end view Serial ATA Sata interface Hot-Plug compatibilitySignal Serial ATA device plug connector pin definitionsSerial ATA connector pin definitions Pin Function DefinitionPage Supported ATA commands Command name Command code in hex ATA-standard commandsCommand name Command code in hex ATA-standard power-management commandsATA-standard security commands Identify Device command Word Description ValueXxxxH Fffeh Description if bit is set to Bit Word Bit WordSet Features command Set Features command values3 S.M.A.R.T. commands M.A.R.T. commandsCode in features register A.R.T. command Barracuda 7200.7 Serial ATA Product Manual, Rev. N Internet MySeagate Reseller.seagate.com Presales SupportTechnical Support Warranty Service Data Recovery Services Authorized Service CentersData Recovery Services FAX services-All Europe toll call Call center Presales and Technical Support Warranty ServiceToll-free support numbers Asia/Pacific support services Publication feedback survey Barracuda 7200.7 Serial ATA Product Manual, Rev. N Index Mtbf RPM RRL Page Page Seagate Technology LLC