Seagate ST336605LW/LC/LCV manual Electrical description, Multimode-SE and LVD alternatives

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Cheetah 73LP Product Manual, Rev. E

Notes [ ] for Tables 12 through 15.

[1]See Section 9.6.4.1 for detailed electrical characteristics of these signals.

[2]The conductor number refers to the conductor position when using 0.025-inch (0.635 mm) centerline flat ribbon cable. Other cables types may be used to implement equivalent contact assignments.

[3]Connector contacts are on 0.050 inch (1.27 mm) centers.

[4]Front panel LED signal; indicates drive activity for host front panel hard drive activity indicator.

[5]Asserted by host to enable Motor Start option (enables starting motor via SCSI bus command).

[6]Asserted by host to enable Delayed Motor Start option (motor starts at power on or after a delay of 12 sec- onds times drive ID). This and [3] above are mutually exclusive options.

[7]Binary code on A3, A2, A1 and A0 asserted by host to set up SCSI bus ID in drive.

[8]GND provides a means for differential devices to detect the presence of a single ended device on the bus. Drive will not operate I/O bus at Ultra2 or Ultra3 SCSI data rates if this is grounded.

[9]Signals [4] through [7] are used in place of installing jumpers and cables on option select connectors J2 and J6. See Section 8.1.1 notes.

[10]“NC” means no connection.

[11]8 bit devices which are connected to the 16 data bit LVD I/O shall leave the following signals open: –DB8, –DB9, –DB10, –DB11, –DB12, –DB13, –DB14, –DB15, and –DBP1.

8 bit devices which are connected to the 16 data bit single-ended (SE) I/O shall have the following signals open: DB8, –DB9, –DB10, –DB11, –DB12, –DB13, –DB14, –DB15, and –DBP1.

All other signals should be connected as shown.

[12]Pins 38, 39, 40, 44, 78, 79, and 80 are option select pins and are tied high by the drive circuitry. The pre- ferred electrical connection at the backplane is either open or grounded (open for the ‘1’ setting, grounded for the ‘0’ setting). Alternatively, these pins may be driven by a 3.3V logic device, pulled up to 3.3V through a pull-up resistor (recommended size of 10K ohm), or grounded through some other means.

9.7Electrical description

Cheetah 73LP LW/LWV and LC/LCV model drives are multimode devices. Their I/O circuits can operate as either single-ended or low voltage differential drivers/receivers (selectable using the I/O “DIFFSENS” line).

See ANSI Standard T10/1302D for detailed electrical specifications.

9.7.1Multimode—SE and LVD alternatives

When the interface “DIFFSNS” line is between –0.35 V and +0.5 V, the drive interface circuits operate single- ended and up to and including 20 megatransfers/second (Fast-20 or Ultra SCSI). When “DIFFSNS” is between +0.7 V and +1.9 V, the drive interface circuits operate low voltage differential and up to and including 80 megatransfers/second (Fast-80 or U160 SCSI).

This multimode design does not allow dynamically changing transmission modes. Drives must operate only in the mode for which the installation and interface cabling is designed. Multimode I/O circuits used by these drives do not operate at high voltage differential levels and should never be exposed to high voltage differential environments unless the common mode voltages in the environment are controlled to safe levels for single- ended and low voltage differential devices (see the ANSI SPI-3 specification T10/1302D).

LC and LW model drives do not have onboard terminators. Termination of the I/O lines must be provided for by the Host equipment designers or end users.

LVD output characteristics

Each differential signal driven by LVD interface drivers shall have the following output characteristics when measured at the disc drive connector:

Steady state Low level output differential voltage = 0.320 V = < Vs = < 0.800 V (signal negation/logic 0) Steady state High level output differential voltage = 0.320 V = < Vs = < 0.800 V (signal assertion/logic 1)

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Contents ST373405LW/LWV/LC/LCV ST336605LW/LC/LCV Page ST373405LW/LWV/LC/LCV ST336605LW/LC/LCV Page Revision status summary sheet Revision Date Writer/Engineer Sheets AffectedPage Contents Seagate Technology support services Defect and error managementInstallation Interface requirementsList of Figures Cheetah 73LP Product Manual, Rev. E ViiPage Scope Cheetah 73LP family drive ST373405LW shownCheetah 73LP Product Manual, Rev. E Applicable standards and reference documentation Taiwanese Bsmi Australian C-TickKorean MIC General description Cheetah 73LP family drive Performance Cheetah 73LP Product Manual, Rev. E Standard featuresMedia characteristics ReliabilityAccessories user installed Factory installed accessoriesOptions factory installed Unformatted and formatted capacitiesPerformance characteristics Prefetch/multi-segmented cache control Ultra2 Scsi Ultra3 ScsiStart/stop time Cheetah 73LP Product Manual, Rev. E Cache operation Caching write dataPrefetch operation Reliability specifications Service life Reliability and servicePreventive maintenance Service philosophy7 S.M.A.R.T Controlling S.M.A.R.TReporting control Performance impactMilliseconds Determining rateImplementation State of the drive prior to testingDST Failure Definition Invoking DSTExtended test Function Code 010b Short and extended testsShort test Function Code 001b Log page entriesProduct repair and return information Cheetah 73LP Product Manual, Rev. E Product warrantyShipping Cheetah 73LP Product Manual, Rev. E DC power requirements Physical/electrical specificationsAC power requirements 3 12 V Current profile Power sequencingConducted noise immunity Typical ST336605 drive +12 V current profile Typical ST336605 drive +5 V current profile Amperes 000 900 800 700 600 Relative humidity TemperatureCheetah 73LP Product Manual, Rev. E Environmental limits Effective altitude sea levelShock and vibration ShockRecommended mounting Acoustics Air cleanlinessVibration LW and LWV mounting configuration dimensions LC and LCV mounting configuration dimensions Drive internal defects Defect and error managementDrive error recovery procedures Scsi systems errors Formatting InstallationConfigure drive options Drive ID/option select headerDo not install jumpers retain cover J5 jumper header on LW/LWV models only J2 option select header Cheetah 73LP Product Manual, Rev. E Function description Does not apply to LC/LCV modelDrive orientation CoolingCheetah 73LP Product Manual, Rev. E Drive mounting GroundingCheetah 73LP Product Manual, Rev. E Interface requirements Scsi interface messages supportedScsi interface commands supported Cheetah 73LP Product Manual, Rev. E Cheetah 73LP Product Manual, Rev. E Inquiry Vital Product data Mode Sense data DEF CHG Cheetah 73LP Product Manual, Rev. E Condition/feature supported by Physical interface DC cable and connector2 REQ/ACK offset Pin Power Scsi interface physical description Scsi interface cable requirementsMating connectors for LC and LCV model drives Mating connectorsMating connectors for LW and LWV model drives ST373405LC/LCV and ST336605LC/LCVCheetah 73LP Product Manual, Rev. E Right-angle to Pcba connectors Scsi ID650±.005 155 100 346 Front View GND +DBP1 62Cheetah 73LP Product Manual, Rev. E REQ +REQ Multimode-SE and LVD alternatives LVD output characteristicsElectrical description General cable characteristics Single-ended drivers/receiversCables for low voltage differential drivers/receivers Terminator requirementsLC and LCV drives Disc drive Scsi timing Spindle status Command status LED status Drive activity LEDCheetah 73LP Product Manual, Rev. E Presales Support Seagate Technology support services Online ServicesAutomated Services Technical SupportEuropean Support Services Customer Service CSOUSA/Canada/Latin America Support Services Call Center Toll-free Direct dial Africa/Middle East Support ServicesAsia/Pacific Support Services Cheetah 73LP Product Manual, Rev. E Index Cheetah 73LP Product Manual, Rev. E Cheetah 73LP Product Manual, Rev. E Scam Scsi Scsi ID 80Cheetah 73LP Product Manual, Rev. E
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