Manuals / Fujitsu / Computer Equipment / Computer Drive

Fujitsu MHW2060AC, MHW2040AC manual Driver circuit, VCM current sense resistor CSR

Models: MHW2060AC MHW2040AC

1 278

Download 278 pages 752 b

Page 70

Theory of Device Operation

(6) Driver circuit

The driver circuit is a power amplitude circuit that receives signals from the spindle motor control circuit and feeds currents to the spindle motor.

(7) VCM current sense resistor (CSR)

This resistor controls current at the power amplifier by converting the VCM current into voltage and feeding back.

4-14

C141-E258

Image 70

Fujitsu MHW2060AC, MHW2040AC manual Driver circuit, VCM current sense resistor CSR

Contents

MHW2060AC, MHW2040AC Disk Drives Product ManualFor Safe Operation Handling of This ManualRevision History MHW2060ACThis page is intentionally left blank Preface Overview of ManualOperating Environment Conventions for Alert MessagesConventions Liability Exception Representation of the data storage capacity in this manualThis page is intentionally left blank Important Alert Items Important Alert MessagesThis page is intentionally left blank Manual Organization Disk Drives Maintenance ManualDisk Drives Product Manual This page is intentionally left blank Contents Installation Conditions Theory of Device OperationContents Interface101 Operations Glossary GL-1 Acronyms and Abbreviations AB-1 Index IN-1 Alternating processing for defective sectorsIllustrations Figures130 Example of rewriting procedure of data 512 KBytes Tables152 Device Overview Functions and performance FeaturesAdaptability High resistance against shock Error correction and retry by ECCLow noise and vibration Connection to ATA interfaceSpecifications summary Device SpecificationsDrive-specific function specification Specifications 1 MHW2060AC MHW2040ACExamples of model names and product numbers Specifications 2Model and product number MHV2060ACRipple Power RequirementsInput Voltage Slope of an input voltage at risePermissible level −0.2 Current Requirements and Power Dissipation Current and power dissipationCurrent fluctuation Typ. at +5 V when power is turned on Environmental SpecificationsEnvironmental specifications Acoustic Noise Acoustic noise specificationShock and vibration specifications Shock and VibrationReliability Service lifeData assurance in the event of power failure Mean time between failures MtbfPositioning error Error RateUnrecoverable read error Media DefectsAdvanced Power Management APM Recommended power-off sequenceAdvanced Power Management APM Advanced Power ManagementThis page is intentionally left blank Device Configuration Device Configuration 2 1 drive connection System ConfigurationATA interface Read/write circuit2 drives configuration 3 2 drives connectionInstallation Conditions Dimensions DimensionsFrame MountingOrientation Limitation of mountingLocation of breather Ambient temperature Service area Handling cautionsHandling cautions Device connector Cable ConnectionsDevice connection Cable connector specificationsCable connector specifications FCIPower supply connector CN1 Jumper SettingsLocation of setting jumpers Factory default setting Master drive-slave drive settingCsel setting 13 Csel settingPower up in standby setting 15 Example 2 of cable selectThis page is intentionally left blank Theory of Device Operation Disk OutlineSubassemblies SpindleServo circuit Circuit ConfigurationAir filter Spindle motor driver circuitPower supply configuration RDC MCU & HDC & RDCMCU SVCPower-on Sequence Power-on operation sequenceSelf-calibration contents Self-calibrationCommand processing during self-calibration Execution timing of self-calibrationWrite circuit Read/write CircuitRead/write preamplifier PreAMP Write precompensationAGC circuit Read circuitProgrammable filter circuit D converter circuit Digital PLL circuitFIR circuit Viterbi detection circuitServo Control Servo control circuitServo burst capture circuit Power amplifierMicroprocessor unit MPU A converter DACDriver circuit VCM current sense resistor CSRData area Data-surface servo formatInner guard band Outer guard bandPhysical sector servo configuration on disk surface Servo frame format Seek operation Actuator motor controlOperation to move the head to the reference cylinder Track following operationStable rotation mode Start modeAcceleration mode Spindle motor controlThis page is intentionally left blank Interface Interface signals Physical InterfaceDA1 PDIAG-, Cblid DA0 DA2 Signal assignment on the connectorSignal assignment on the interface connector Dasp GNDStop MstrDiow DiorDasp PdiagCblid IordyLogical Interface I/O registers 1 I/O registersDA2 DA1 DA0 Data register X’1F0’ Command block registersError register X’1F1’ UNCSET Multiple Mode Features register X’1F1’Sector Count register X’1F2’ Cylinder Low register X’1F4’ Sector Number register X’1F3’Cylinder High register X’1F5’ Status register X’1F7’ Device/Head register X’1F6’DEV HS3 HS2 HS1 HS0 BSYInterface Control block registers Command register X’1F7’Alternate Status register X’3F6’ Device Control register X’3F6’ Host CommandsCommand code and parameters HOB SrstCommand Name Command code and parameters 1Parameter Used Command code and parameters 2 EXT Write Multiple FUA EXT Flush Cache EXTHost Commands Command descriptions Host Commands Recalibrate X’10’ to X’1F’ Read Sectors X’20’ or X’21’ MSBEnd head No. / LBA MSB Write Sectors X’30’ or X’31’ 1F7HST Status information 1F6HDH Write Verify X’3C’ Read Verify Sectors X’40’ or X’41’ Seek X’70’ to X’7F’ Execute Device Diagnostic X’90’ Diagnostic codeHost Commands Initialize Device Parameters X’91’ Download Microcode X’92’ Operation of Download Microcode Standby Immediate X’94’ or X’E0’ Unload Feature Host Commands Standby X’96’ or X’E2’ Idle X’97’ or X’E3’ 1F4HCL 1F3HSN 1F2HSC 1F1HER Error information C141-E258 ’FF’ Check Power Mode X’98’ or X’E5’Sleep X’99’ or X’E6’ Interface Smart X’B0 Features register values subcommands and functions 1 Smart Disable Operations Features register values subcommands and functions 2Smart Enable Operations Smart Read LOG’DB’ Smart ENABLE/DISABLE Auto OFF-LINE Features register values subcommands and functions 3Smart Return Status At command issuance I-O registers setting contents 1F7 HCM 1FF Format of device attribute value dataFormat of insurance failure threshold value data Data format version number Attribute IDAttribute value for the worst case so far Status FlagCurrent attribute value Raw attribute valueSelf-test execution status 10 Off-line data collection status11 Self-test execution status Failure prediction capability flag Off-line data collection capability12 Off-line data collection capability 13 Failure prediction capability flagCheck sum Error logging capability14 Error logging capability Insurance failure thresholdSmart error logging 16 Data format of Smart Summary Error Log Total number of drive errors Command data structureError data structure 17 Data format of Smart Comprehensive Error Log1FC Smart self-test18 Smart self-test log data format Self-test numberCurrent LBA under test 19 Selective self-test log data structureTest span Current span under test20 Selective self-test feature flags Feature FlagsSelective Self-test pending time min Device Configuration Freeze Device Configuration XB1Device Configuration Restore Device Configuration IdentifyDevice Configuration Identify FR = C2h Device Configuration Restore FR = C0hDevice Configuration Freeze Lock FR = C1h Device Configuration SET FR = C3hInterface 21 Device Configuration Identify data structure 1 21 Device Configuration Identify data structure 2 Execution example of Read Multiple command Read Multiple X’C4’MSB Write Multiple X’C5’ Interface SET Multiple Mode X’C6’ 1F5HCH Read DMA X’C8’ or X’C9’ End head No. / LBA MSB Write DMA X’CA’ or X’CB’ Interface Read Buffer X’E4’ Flush Cache X’E7’ Write Buffer X’E8’ Identify Device X’EC’ Identify Device DMA X’EE’ 22 Information to be read by Identify Device command 1 ’3FFF’22 Information to be read by Identify Device command 2 3FFF Command without interrupt supports 2, 4, 8 and 16 sectors = Supports the Host Protected Area feature set Option customizing Word Bit C141-E258 Interface Write Stream EXT Interface Host Commands Word Bit Reserved Security level High, 1 Maximum ’BB’ SET Features X’EF’23 Features register values and settable modes ’CC’Data Transfer Mode Advanced Power Management APM Automatic Acoustic Management AAM 24 Contents of Security SET Password data At command issuance I-O register contents 1F7hCM 1F6hDH When the user password is selected When the master password is selectedSecurity UNLOCKX’F2’ Interface Security Erase Prepare X’F3’ Security Erase Unit X’F4’ Security Freeze Lock X’F5’ 1F4hCL 1F3hSN 1F2hSC 1F1hER Error information 100 C141-E258 26 Contents of security password Interface Read Native MAX Address X’F8’ SET MAX X’F9’ SET MAX AddressSET MAX SET Password FR = 01h SET MAX Lock FR = 02h SET MAX Unlock FR = 03h SET MAX Freeze Lock FR = 04h Host Commands Read Sectors EXT X’24’ Option customizing Description HOB=0 Read DMA EXT X’25’ Option customizing DescriptionHOB=1 Error reporting conditions Read Multiple EXT X’29’ Option customizing Description Read LOG EXT X2F Optional command Customize Description Host Commands Write Sectors EXT X’34’ Option customizing Description Write DMA EXT X’35’ Option customizing Description SET MAX Address EXT X’37’ Option customizing Description SET MAX LBA Write Multiple EXT X’39’ Option customizing Description Write DMA FUA EXT X’3D’ Option customizing Description Write LOG EXT X’3F’ Optional command Customize Description Number of sectors to be written to the specified log Read Verify Sectors EXT X’42 Option customizing Description Write Multiple FUA EXT X’CE’ Option customizing Description Flush Cache EXT X’EA’ Option customizing Description Error posting 27 Command code and parameters 127 Command code and parameters 2 PIO Data transferring commands from device to host Command ProtocolExecute Device Diagnostic Initialize Device Parameters Read Sectors Command protocol Protocol for command abort PIO Data transferring commands from host to device Write Sectors command protocol Commands without data transfer Read Multiple EXT Write Multiple EXT/FUA EXT Sleep Other commandsDMA data transfer commands Read DMA EXT Write DMA EXT/FUA EXT Indentify Device DMANormal DMA data transfer Ultra DMA Feature Set OverviewUltra DMA data in commands Phases of operationInitiating an Ultra DMA data in burst Pausing an Ultra DMA data in burst Data in transferTerminating an Ultra DMA data in burst Ultra DMA Feature Set Interface Ultra DMA data out commands Initiating an Ultra DMA data out burstPausing an Ultra DMA data out burst Data out transferTerminating an Ultra DMA data out burst Interface Ultra DMA CRC rules DIOR-HDMARDY-HSTROBE Series termination required for Ultra DMA28 Recommended series termination for Ultra DMA DIOW-STOPTiming PIO data transfer10 Multiword DMA data transfer timing mode Multiword data transferUltra DMA data transfer 11 Initiating an Ultra DMA data in burstName Mode Comment Strobe29 Ultra DMA data burst timing requirements 2 MIN MAXMode Name Comment 30 Ultra DMA sender and recipient timing requirementsDD150 Sustained Ultra DMA data in burstAt device At hostDmack Host pausing an Ultra DMA data in burstDmarq HdmardyHost Device terminating an Ultra DMA data in burstDmarq device Dstrobe device DD150Dstrobe device Host terminating an Ultra DMA data in burstDA0, DA1, DA2 CS0, CS1 16 Initiating an Ultra DMA data out burst Hstrobe at host DD150 at host Sustained Ultra DMA data out burstDD150 At device Device DMACK- host Stop host DDMARDY- device Device pausing an Ultra DMA data out burstHstrobe host DD150 host Host terminating an Ultra DMA data out burst 19 Host terminating an Ultra DMA data out burstDevice terminating an Ultra DMA data out burst Dmarq device DMACK- hostMaster and slave devices are present 2-drives configuration Power-on and resetOnly master device is present Operations Device Response to the Reset Response to power-onResponse to hardware reset Response to power-onResponse to hardware reset Response to software reset Response to software resetResponse to diagnostic command Response to diagnostic commandActive mode Power SavePower save mode Active idle modeStandby mode Sleep modeDefect Processing Power commandsSpare area Sector slip processing Alternating processing for defective sectorsTrack slip processing Automatic alternating processing Automatic alternating processing8MB buffer 8,388,608 bytes Read-ahead CacheData buffer structure Read Sectors EXT Read Multiple EXT Read DMA EXTData that is a target of caching Commands that are targets of cachingCaching operation Invalidating caching-target dataSmart Using the read segment buffer Miss-hitSequential hit Full hit Cache operation Command that are targets of cachingWrite Cache Invalidation of cached dataCaching function when power supply is turned on Status report in the event of an errorReset response Enabling and disablingOperations Glossary PIO Programmed input-output Power save modeRotational delay PositioningStatus VCMThis page is intentionally left blank Acronyms and Abbreviations This page is intentionally left blank Index AAMIndex Host pausing ultra DMA data Read Sectors Command Read Native MAX AddressSurface temperature measurement This page is intentionally left blank Comment Form JapanThis page is intentionally left blank C141-E258-03EN Page