Samsung M8 manual Set Features Register Definitions, Transfer Mode Values

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	Table 8-11 Set Features Register Definitions

Code	Description
02h	Enable Write Cache

03h	Set transfer mode based on value in Sector Count register

06h	Enable Power-Up in Standby Mode

07h	Power-Up in Standby feature set device spin up

10h	Enable use of SATA features
	SC=02: DMA Setup FIS Auto Activate automation
	SC=03: Device-initiated interface power state transition
	SC=06: Software Settings Preservation

42h	Enable Automatic Acoustic Management feature set.

44h	Obsolete (Set VU ECC length)

55h	Disable read look-ahead feature

82h	Disable Write Cache

86h	Disable Power-Up in Standby Mode

90h	Disable use of SATA features
	SC=02: DMA Setup FIS Auto Activate automation
	SC=03: Device-initiated interface power state transition
	SC=06: Software Settings Preservation

AAh	Enable read look-ahead feature

BBh	Obsolete (Set 4-byte ECC length)

C2h	Disable Automatic Acoustic Management feature set.

D2h-DFh	VU Features

F0h-FFh	VU Features

When the drive receives this command, it checks the contents of the Feature register, clears BSY, and generates an interrupt. If the value in the Feature register is not supported or is invalid, the drive posts an Aborted Command error.

A host can choose the transfer mechanism by Set Transfer Mode and specifying a value in the Sector Count register in feature 03. The upper 5 bits define the type of transfer, and the low order 3 bits encode the mode value. Refer to the following table for details.

Table 8-12 Transfer Mode Values

Mode	Bits(7:3)	Bits(2:0)
PIO default mode	00000	000
PIO default mode, disable IORDY	00000	001
PIO flow control transfer mode	00001	mode
Multiword DMA mode	00100	mode
Ultra DMA mode	01000	mode

Mode = transfer mode number

Spinpoint M8 Product Manual REV 2.3

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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 Reference SataIntroduction DescriptionKey Features Hardware Requirements Standards and RegulationsSpecification Summary SpecificationsSpecifications Spindle speed RPM RPM ClassLogical Configurations Physical SpecificationsPhysical Specifications Physical dimensionsPerformance Specifications Power consumption Power consumptionPower Requirements RatedEnvironmental Specifications Environmental Specifications15.0 Reliability Specifications Space Requirements InstallationMounting Unpacking InstructionsOrientation Mounting DimensionsMounting-Screw Clearance ClearanceCable Connectors VentilationSata Connectivity Serial ATA Management PowerHDD Power, Sata Interface, and Factory Jumper Connector Pin Locations on the Drive Pcba DC Power Connector and SATA-Bus Interface Cable Connections Drive InstallationBase Casting Assembly Head / Disk Assembly HDADC Spindle Motor Assembly Disk Drive OperationCoverAssembly Head Stack Assembly Disk Stack AssemblyVoice Coil Motor and Actuator Latch Assemblies Air Filtration SystemDigital Signal Process and Interface Controller Drive ElectronicsDisk Controller DDR Buffer Control Block Host Interface Control BlockDisk Control Block Disk Ldpc Control BlockFrequency Synthesizer Read/Write IC Power ManagementTime Base Generator Automatic Gain ControlAnalog to Digital Converter ADC and FIR Analog Anti-Aliasing Low Pass FilterServo System Read and Write OperationsRead Channel Firmware Features Write ChannelRead Caching Write Caching Automatic Defect Allocation Defect ManagementMulti-burst ECC Correction SmartSata Terminology Sata II InterfaceSpinpoint M8 Product Manual REV Signal Descriptions Physical Interface Signal Summary2 I/O Register Address When read When writtenControl Block Register Descriptions RegistersFeatures Register and Feature Extended Register Ex F1h Command Block Register DescriptionsError Register Ex F1h Device Control Register ex F6hDevice Register Ex F6h Command Register Ex F7hStatus Register Ex F7h Device Activity Signal Sata II Feature SETStaggered Spin-up Disable Control Auto-Activate in DMA Setup FISPhy. Event Counters Sata Power Management Software Settings PreservationATA Command Descriptions Command TableCommand Code Parameters Check Power Mode E5h Command DescriptionsDevice Configuration Overlay Feature Register Values Device Configuration Overlay B1hCommand Download Micro Code 92hDevice Configuration Identify data structure Word Content Diagnostic Codes Execute Device Diagnostics 90hFlush Cache E7h, EAh extended Format Track 50hIdentify Device information Content Description=the fields reported in word 88 are valid EXT =Media Card Pass Through command feature set supported WWN Word Content DescriptionAutomatic Standby Timer Periods Idle E3hIdle Immediate E1h NOP 00h Initialize Device Parameters 91hRead 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 Recalibrate 10h Security Disable Password F6h Security Erase Prepare F3h Security Erase Unit F4hSecurity Erase Unit Password Word Content Security Set Password F1hSecurity Set Password data content Security Freeze Lock F5hIdentifier Level Command result Set Features EFhSecurity Unlock F2h Seek 7xh12 Transfer Mode Values 11 Set Features Register Definitions13 Set Max Feature Register Values Set Multiple Mode C6hSet Max Address F9h, 37h extended Sleep E6hSmart disable operations D9h 14 Smart Feature Registers ValuesSmart enable/disable attribute auto-save D2h Smart B0hSmart execute off-line immediate D4h Smart enable operations D8h15 Device Smart Data Structure Smart read data D0hData Structure Revision Number 16 Smart Attribute Status Flags Bit Name Description18 Off-line Data Collection Status Values 17 Smart Attribute Data List19 Self-test Execution Status Values Self-test execution status byteSmart read log sector D5h Smart return status DAhSmart write log sector D6h Write Buffer E8h Standby Immediate E0hWrite 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 HDD handling guide Prevent Shocks Service and Repair