Maxtor 53073H4, 51536H2, 52049H3, 546106 specifications CommandRegister

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HOST SOFTWARE INTERFACE

CommandRegister

Contains code for the command to be performed. Additional command information should be written to the task file before the Command register is loaded. When this register is written, the BUSY bit in the Status register sets, and interrupt request to the host clears; invalid commands abort. (Detailed information on interface commands is given in Section 7.) Hex values for valid command formats follow:

Read Commands
Read Sector(s)	20h	Normal reads; retries enabled
	21h	Normal reads; retries disabled
	22h	Read Long; retries enabled
	23h	Read Long; retries disabled
Read Verify Sector(s)	40h	Retries	enabled
	41h	Retries	disabled
Read Sector Buffer	E4h
Read Multiple	C4h
Read DMA		C8h
	C9h	No retries
Write Commands
Write Sector(s)	30h	Normal writes; retries enabled
	31h	Normal writes; retries disabled
	32h	Write Long; retries enabled
	33h	Write Long; retries disabled
Write Verify Sector(s)	3Ch
Write Sector Buffer	E8h
Write Multiple	C5h
Write DMA	CAh
	CBh	No retries
Mode Set/Check Commands
Set Features	EFh
Set Multiple Mode	C6h
Read Native Max Address	F8h
Set Max Mode	F9h
Power Mode Commands
Standby Immediate	94/E0h	Stops drive spindle; do not change time-out value
Idle Immediate	95/E1h	Starts spindle; do not change time-out value
Standby	96/E2h	Stops spindle; change time-out value
Idle	97/E3h	Starts spindle; change time-out value
Check Power Mode	98/E5h
Set Sleep Mode	99/E6h
Initialization Commands
Identify Drive	ECh
Initialize Drive Parameters	91h
Re-calibrate	1xh
Seek, Format, and Diagnostic Commands
Seek	7xh
Format Track	50h
Execute Drive Diagnostic	90h
S.M.A.R.T. Commands
Execute S.M.A.R.T.	B0h

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Contents Corporate Headquarters REV EC N O SEC Tion Desc Ription ATE Before You Begin U T I O NContents Product Specifications Handling and InstallationHost Software Interface Interface CommandsAT Interface Description Service and Support GlossaryFigures ManualOrganization IntroductionMaxtorCorporation AbbreviationsConventions KeyFeatures Product DescriptionModel S SP T MAX LB a Apac IT Y Product FeaturesFunctional / Interface CacheManagement MajorHDAComponents CylinderLimitationJumperDescription SubsystemConfigurationJumper Location / Configuration PerformanceSpecifications ProductSpecificationsDriveConfiguration ModelsandCapacitiesPhysicalDimensionsmaximum Aram E TE R Stan D ARD ME T RICEPA Energy Star Compliance PowerRequirementsPowerModeDefinitions EnvironmentalLimitsParam E TE R OP ER AT ING ON- OPE R AT ING ReliabilitySpecificationsShock and Vibration SafetyRegulatoryCompliance EMC/EMIElectro-StaticDischargeESD HandlingandInstallationHardDriveHandlingPrecautions UnpackingandInspection Multi-pack Shipping ContainerPhysicalInstallation RepackingBefore You Begin Hook upSet up Start upPinDescriptionSummary InterfaceConnectorATInterfaceDescription PIN IGN ALPIN Name Signal Name Signal Desc Ription Pin Description TableIM in G Paramet ERS Mode PIO TimingImin G Paramet ERS Mode DMATimingUltra DMA Timing ModeSustained Ultra DMA Data In Burst Device Terminating an Ultra DMA Data In Burst Initiating an Ultra DMA Data Out Burst Device Pausing an Ultra DMA Data Out Burst Device Terminating an Ultra DMA Data Out Burst POR T EAD WR ITE HostSoftwareInterfaceTask File Registers Conten TS LBA Bits CommandRegister Summary M M a N D N a M E M M a N D code PA R a M E T E R S U S E DControl Diagnostic Registers Reset and Interrupt Handling InterfaceCommands ReadCommands Read DMA WriteCommands Write Multiple LE VE L ModeSet/CheckCommandsVAL UE DES C RIP Tion VAL UE Omman D PowerModeCommands Timer VAL UE TIME-OUT PeriodSleep Mode InitializationCommands Or D ENT Desc RiptionOr D 15- 10, as c urrently defined Initialize Drive Parameters Seek,FormatandDiagnosticCommands ER ROR Code Desc RiptionA.R.T. CommandSet Key RegisterNoQuibbleService ServiceandSupportServicePolicy SupportFrom Dial Accesstime GlossaryCorrectableerror Fetch Landingzoneorlzone Physicalsector Softerror