Samsung M8 manual Status Register Ex F7h

Page 48

DEV is reserved.

Bit0-bit3 is defined for the binary coded address of the head to be selected in CHS mode (e.g. if H3 through HS0 are 0011b, respectively, then head 3 will be selected). HS3 is the most significant bit. In 28 bit LBA mode bit0-3 HS3 contains bits 24-27 of the LBA. After command completion, this register is updated to reflect the currently selected disk address.

LBA is to select the Logical Block Addressing Mode. When LBA=0, disk addressing is by CHS mode. When LBA=1, disk addressing is by LBA mode. This bit was set to zero when the ATA drive didn’t support LBA mode.

6.3.4.10Status Register (Ex. 1F7h)

This register contains the drive status. The contents of this register are updated at the completion of each command. When BSY is cleared, the other bits in this register become valid within 400 nsec. If BSY=1, no other bits in this register are valid. If the host reads this register when an interrupt is pending, it is considered to be the interrupt acknowledge. Any pending interrupt is cleared whenever this register is read.

7	6	5	4	3	2	1	0
BSY	DRDY	#	#	DRQ	Obsolete	Obsolete	ERR

BSY (Busy) is set whenever the drive has access to the Command Block registers. The host should not access the Command Block registers when BSY=1. When BSY=1, a read of any Command Block register returns the contents of the Status register.

DRDY (Drive Ready) indicates that the drive is capable of responding to a command. When there is an error, this bit does not change until the host reads the Status register. Then the bit again indicates the current readiness of the drive. This bit clears at power-on and remains clear until the drive is ready to accept the command.

DRQ (Data Request) indicates that the drive is ready to transfer a word or byte of data between the host and the drive.

ERR (Error) indicates that an error occurred during execution of the previous command. The bits in the Error register have additional information regarding the cause of the error.

Spinpoint M8 Product Manual REV 2.3

42

Image 48

Contents M8 Product Manual Page Table of Contents Servo System Read and Write Operations Read Fpdma Queued 60h Read Log Extended 2Fh Read Long 22h Table of Tables Scope User DefinitionManual Organization Sata ReferenceDescription IntroductionKey Features Standards and Regulations Hardware RequirementsSpecifications Specification SummarySpecifications Spindle speed RPM RPM ClassPhysical Specifications Logical ConfigurationsPhysical Specifications Physical dimensionsPerformance Specifications Power consumption Power consumptionPower Requirements RatedEnvironmental Specifications Environmental Specifications15.0 Reliability Specifications Installation Space RequirementsUnpacking Instructions MountingMounting Dimensions OrientationClearance Mounting-Screw ClearanceCable Connectors VentilationSata Connectivity Serial ATA Power ManagementHDD Power, Sata Interface, and Factory Jumper Connector Pin Locations on the Drive Pcba Drive Installation DC Power Connector and SATA-Bus Interface Cable ConnectionsHead / Disk Assembly HDA Base Casting AssemblyDC Spindle Motor Assembly Disk Drive OperationCoverAssembly Disk Stack Assembly Head Stack AssemblyVoice Coil Motor and Actuator Latch Assemblies Air Filtration SystemDigital Signal Process and Interface Controller Drive ElectronicsDisk Controller DDR Host Interface Control Block Buffer Control BlockDisk Control Block Disk Ldpc Control BlockFrequency Synthesizer Power Management Read/Write ICTime Base Generator Automatic Gain ControlAnalog Anti-Aliasing Low Pass Filter Analog to Digital Converter ADC and FIRServo System Read and Write OperationsRead Channel Firmware Features Write ChannelRead Caching Write Caching Defect Management Automatic Defect AllocationMulti-burst ECC Correction SmartSata II Interface Sata TerminologySpinpoint M8 Product Manual REV Physical Interface Signal Summary Signal Descriptions When read When written 2 I/O Register Address Control Block Register Descriptions RegistersCommand Block Register Descriptions Features Register and Feature Extended Register Ex F1hError Register Ex F1h Device Control Register ex F6hCommand Register Ex F7h Device Register Ex F6hStatus Register Ex F7h Sata II Feature SET Device Activity SignalStaggered Spin-up Disable Control Auto-Activate in DMA Setup FISPhy. Event Counters Software Settings Preservation Sata Power ManagementATA Command Descriptions Command TableCommand Code Parameters Command Descriptions Check Power Mode E5hDevice Configuration Overlay B1h Device Configuration Overlay Feature Register ValuesCommand Download Micro Code 92hDevice Configuration Identify data structure Word Content Execute Device Diagnostics 90h Diagnostic CodesFlush Cache E7h, EAh extended Format Track 50hContent Description Identify Device information=the fields reported in word 88 are valid EXT =Media Card Pass Through command feature set supported Word Content Description WWNAutomatic Standby Timer Periods Idle E3hIdle Immediate E1h Initialize Device Parameters 91h NOP 00hRead Buffer E4h Read DMA C8h, 25h extendedRead Multiple Command C4h, 29h extended Read Log Extended 2FhRead Long 22h Read Native Max Address F8h, 27h extended Read Sectors 20h, 24h extendedRead Verify Sectors 40h, 41h extended Security Disable Password F6h Recalibrate 10hSecurity Erase Prepare F3h Security Erase Unit F4hSecurity Set Password F1h Security Erase Unit Password Word ContentSecurity Set Password data content Security Freeze Lock F5hSet Features EFh Identifier Level Command resultSecurity Unlock F2h Seek 7xh11 Set Features Register Definitions 12 Transfer Mode ValuesSet Multiple Mode C6h 13 Set Max Feature Register ValuesSet Max Address F9h, 37h extended Sleep E6h14 Smart Feature Registers Values Smart disable operations D9hSmart enable/disable attribute auto-save D2h Smart B0hSmart enable operations D8h Smart execute off-line immediate D4hSmart read data D0h 15 Device Smart Data StructureData Structure Revision Number Bit Name Description 16 Smart Attribute Status Flags17 Smart Attribute Data List 18 Off-line Data Collection Status ValuesSelf-test execution status byte 19 Self-test Execution Status ValuesSmart read log sector D5h Smart return status DAhSmart write log sector D6h Standby Immediate E0h Write Buffer E8hWrite DMA CAh, 35h extended Write Fpdma Queued 61hWrite Multiple Command C5h, 39h extended Write Long 32hWrite Sectors 30h, 34h extended Spinpoint M8 Product Manual REV Maintenance Maintenance PrecautionsGeneral Information HDD handling guide -Please handle HDD by side surfaces Service and Repair HDD handling guide Prevent Shocks