Seagate ST3400071FC, ST3500071FC LED driver signals, LED drive signal, Differential Pecl output

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9.6.2LED driver signals

Fault and Active LED signals are located in the FC-SCA connector (J1). See Table 35 for the output character- istics of the LED drive signals.

Table 35:	LED drive signal

State		Current drive available	Output voltage

LED off, high		0 < IOH < 100µA

LED on, low		IOL < -30 mA	0 < VOL < 0.8V

9.6.3Differential PECL output

The serial PECL output signal voltage characteristics are provided in Table 36. The outputs are not AC coupled in order to deliver maximum signal without rise and fall time degradation. You must AC couple the receiver to isolate potentially different DC characteristics of the outputs and the receiver.

Table 36: Differential PECL output characteristics

Description	Parameter

Serial output voltage swing	600 < Vout < 1300 mV

Figure 12 provides the data output valid eye diagram relative to the bit cell time. Table 38 lists the data values.

Bit Time

Vout (mv)

XMIT Eye

Figure 12. Transmit eye diagram

9.6.4Differential PECL input

The serial PECL input signal voltage characteristics are provided in Table 37.

Table 37: Differential PECL input characteristics

Description	Parameter	Notes

Serial input voltage swing	400 < Vin < 2.000 mV	AC coupled

68	NL35 Series FC Product Manual, Rev. D

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Contents NL35 Series FC ST3500071FC ST3400071FCPage Contents Installation Defect and error managementInterface requirements Seagate Technology support services NL35 Series FC Product Manual, Rev. D List of Figures NL35 Series family disc driveViii NL35 Series FC Product Manual, Rev. D Scope NL35 Series family disc driveNL35 Series FC Product Manual, Rev. D Applicable standards and reference documentation StandardsElectromagnetic compatibility Electromagnetic susceptibilityElectromagnetic compliance Environmental protectionReference documents Fibre Channel Interface ManualNL35 Series FC Product Manual, Rev. D General description Standard features Media description PerformanceReliability Formatted capacitiesFactory-installed accessories Factory-installed optionsUser-installed accessories Programmable drive capacityPerformance characteristics Internal drive characteristicsSeek performance characteristics Access timeGeneralized performance characteristics GHzPrefetch/multi-segmented cache control Start/stop timeCache operation Caching write data Prefetch operationPage NL35 Series FC Product Manual, Rev. D Reliability specifications Error ratesReliability and service Recoverable ErrorsUnrecoverable errors Seek errorsMean Time Between Failure Mtbf Preventive maintenanceHot plugging the drive 4 S.M.A.R.T Controlling S.M.A.R.TPerformance impact MillisecondsTemperature Log page 0Dh Predictive failuresThermal monitor Parameter Code DescriptionState of the drive prior to testing Drive Self Test DSTDST Failure Definition ImplementationInvoking DST Short and extended testsShort test Function Code 001b Extended test Function Code 010bProduct warranty AbortShipping Product repair and return informationPhysical/electrical specifications AC power requirementsDC power requirements ST3500071FC/ST3400071FC DC power requirementsPower sequencing General DC power requirement notesConducted noise immunity Power dissipation Temperature Environmental limitsRelative humidity Effective altitude sea levelShock and vibration Package size Packaged/product weight Drop heightShock Recommended mounting Air cleanliness VibrationCorrosive environment Typical idle mode sound power ST3500071FC and ST3400071FCAcoustics Mechanical specifications Mounting configuration dimensionsNL35 Series FC Product Manual, Rev. D Drive internal defects/errors Defect and error managementDrive error recovery procedures 108.3 Background Media Scan FC-AL system errorsMedia Pre-Scan NL35 Series FC Product Manual, Rev. D Drive ID/option selection InstallationDrive orientation Cooling Air flowDrive mounting GroundingNL35 Series FC Product Manual, Rev. D FC-AL features Fibre Channel link service framesLink services supported Type of frame Link serviceFibre Channel task management functions Fibre Channel Scsi FCP task management functionsFibre Channel task management responses FC Scsi FCP response codesNPort login Plogi payload Fibre Channel port loginBytes Fibre Channel port login accept NPort Login Accept ACC payloadFibre Channel Process Login Process Login Plri payloadFibre Channel Process Login Accept Process Login Accept ACC payloadFibre Channel fabric login Fabric Login Flogi payloadFibre Channel fabric accept login Fabric Login Accept ACC payloadDual port support Fibre Channel Arbitrated Loop optionsFC-AL options supported Option SupportedSupported commands Scsi commands supportedCommand code Supported Command name Supported commands Supported commands Supported commands Supported commands Mode Sense data Inquiry dataNL35 Series inquiry data Bytes Data hexPage DEF CHG NL35 Series FC Product Manual, Rev. D Miscellaneous operating features and conditions Miscellaneous featuresSupported Feature or condition Miscellaneous statusFC-AL physical interface Physical characteristicsPhysical description Part description Positions Part number Features Connector requirementsElectrical description Pin descriptions Pin Signal name Signal typeFC-SCA pin descriptions Fault LED Out PowerFC-AL transmitters and receivers Enable port bypass signals Normal command activity LED statusActive LED Out Active LED Out conditionsMotor start control signals Parallel Enclosure Services Interface ESIMotor start controls 11 SEL6 through SEL0 ID linesArbitrated loop physical address Alpa values SettingHex Dec Signal characteristics LED driver signals LED drive signalDifferential Pecl output characteristics Differential Pecl input characteristicsEye diagram data values Link rate GHzNL35 Series FC Product Manual, Rev. D Seagate Technology support services InternetPresales Support Technical SupportData Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Index NumericsFAN Flogi Plogi Page See also cooling