Samsung M8-DVR manual Host Interface Control Block, Buffer Control Block

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5.2.2.1The Host Interface Control Block

The SATA Disk Controller provides direct interface to an SATA bus. It is compatible with ATA 7 Specs. It provides a means for the host to access the Task File registers used to control the transfer of data between host memory and the disk drive.

The SATA Host Interface Control block can be programmed to execute various host read/write commands either completely automatically without any DSP intervention, semi-automatically with minimal DSP intervention, or manually with the aid of the DSP.

The Disk Controller has significant advances in ATA automation. The highlights of ATA automation includes:

Automatic data transfer management for multi-sector Read/Write commands without DSP intervention.

Automatic execution of read commands (Auto-Read command execution) for cached data in the buffer by matching the first sector.

Automatic Task File registers updates during automatic multi-sector transfers.

Automatic NCQ queue tag validation

Spinpoint M8 supports PIO, DMA, and FPDMA data transfers. The supported DMA type transfers include multi- word (MWDMA) and synchronous Ultra DMA (UDMA) transfers. The bus emulates automatically switched between 16- and 8-bit mode while performing Read Long and Write Long commands at the time of ECC byte transfers.

Additional functionality is provided in the Host Interface Block by the following features:

Programmable transfer length for automatic ECC byte transfer on the AT bus.

Support of both LBA and CHS Task File registers formats.

Automatic detection of both the Software Reset and COMRESET.

Support for PIO modes 0 through 4.

Support for multiword DMA modes 0 through 2.

Support for multiword DMA modes 0 through 2.

Support for synchronous DMA (UDMA) transfer mode 0 through 7. (Mode 7 is referring to 150 MB/S)

Support for First Party DMA (FDMA) for NCQ commands.

5.2.2.2The Buffer Control Block

The Buffer Control block manages the flow of data into and out of the buffer. Significant automation allows buffer activity to take place automatically during read/write operations between the host and the disk. This automation works together with automation within the Host Interface Control and Disk Control blocks to provide more bandwidth for the local microprocessor to perform non-data flow functions.

The buffer control circuitry keeps track of buffer full and empty conditions and automatically works with the Disk Control block to stop transfers to or from the disk when necessary. In addition, transfers to or from the host are automatically stopped or started based on buffer full or empty status.

A prioritized five ports architecture is implemented. All ports, except the refresh port, utilize 22-bit buffer address pointers.

The data path to the buffer RAM can be configured as 16-bit path in ATA mode.

Spinpoint M8-DVR Disti Product Manual REV 2.0

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Contents M8-DVR Product Manual Page Table of Contents Smart APM 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 SpecificationsLogical Configurations Physical SpecificationsPhysical Specifications Physical dimensionsPerformance Specifications Power consumption Power consumptionPower Requirements RatedEnvironmental Specifications Environmental SpecificationsLinear Shock 1/2 sine pulse Rotational Shock1Measurement Position Annualized Failure Rate AFR Reliability SpecificationsSpace Requirements InstallationMounting Unpacking InstructionsOrientation Mounting DimensionsCable Connectors VentilationSata Connectivity Computer mainboard Serial ATA Management PowerHDD Power, Sata Interface, and Factory Jumper Connector SATA-Bus Interface ConnectorPin 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 ManagementSmart 6 APMSata Terminology Sata II InterfaceSpinpoint M8-DVR Disti Product Manual REV Signal Descriptions Physical Interface Signal Summary2 I/O Register Address When read When writtenControl Block Register Descriptions RegistersCommand Block Register Descriptions Device 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 Smart Check Power Mode E5h Command DescriptionsDevice Configuration Overlay B1h 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 F6hSecurity Erase Prepare F3h Security Erase Unit F4hSecurity Erase Unit Password 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 D0hByte 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-DVR Disti Product Manual REV Maintenance Maintenance PrecautionsGeneral Information HDD handling guide -Please handle HDD by side surfaces HDD handling guide Prevent Shocks Service and Repair

M8-DVR specifications

The Samsung M8-DVR is an advanced digital video recorder designed to meet the ever-evolving demands of modern surveillance and recording needs. This cutting-edge device combines state-of-the-art technology with user-friendly features, making it a reliable choice for both residential and commercial applications.

At the core of the M8-DVR’s design is its high-definition recording capability. The device supports various resolutions, including Full HD 1080p, ensuring that all captured footage is crystal clear. This clarity is crucial for identifying details, whether for security purposes or monitoring activities around the clock. It can accommodate multiple camera inputs, allowing users to expand their surveillance network seamlessly.

One of the standout features of the M8-DVR is its remarkable storage capacity. Equipped with advanced hard disk technology, it can store several terabytes of footage, which can be further expanded using additional drives. This means that even with continuous recording, users won’t have to worry about running out of storage quickly. The device also incorporates efficient compression technologies, such as H.265, which allows for reduced file sizes without sacrificing video quality.

In terms of connectivity, the M8-DVR offers various options, including Ethernet ports for network connectivity, USB ports for data transfer, and HDMI output for direct connection to monitors. This versatility allows users to easily stream live footage or review recordings on larger screens. The device supports remote viewing through mobile applications, allowing users to monitor their property from virtually anywhere in real-time.

User experience is further enhanced by an intuitive interface that makes navigation simple and efficient. It includes features like motion detection and alerts, which notify users of any unusual activities. The advanced search function is another highlight, enabling users to quickly locate specific events in their recordings without long hours of scrolling.

The Samsung M8-DVR is also designed with durability in mind. It comes with robust security features to protect against unauthorized access and offers backup options to prevent data loss. With its blend of technology, storage capabilities, and user-friendly design, the Samsung M8-DVR stands out as a comprehensive solution for modern video surveillance needs, making it an essential tool for enhancing security and peace of mind in any environment.
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