Samsung M8-DVR manual Read/Write IC, Power Management, Time Base Generator, Automatic Gain Control

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5.2.2.6Power Management

Power management features are incorporated into each block of the Spinpoint M8. This allows the designer to tailor the amount of power management to the specified design. Other power management features include:

Independent power management control for each block.

DSP block powered down and up when needed.

Disk Sequencer and associated disk logic powered up when the Disk Sequencer is started.

Weak pull-up structure on input pins to prevent undesirable power consumption due to floating CMOS inputs.

5.2.3Read/Write IC

The Read/Write IC, shown in Figure 5-3 provides read/write-processing functions for the drive. The Read/Write IC receives the Read GATE and Write GATE signals, write data, and servo AGC and gates from the Interface Controller. The Read/Write IC sends decoded read data and the read reference clock. It receives write data from the Interface Controller.

The 88C9410 which is embedded in 88i9422 is a sampled-data digital PRML channel designed to work with a disk controller and a read/write preamplifier to provide the signal processing elements required to build a state of the art high density, high speed disk drive.The 88C9410 implements a noise predictive, PRML Viterbi read channel (supporting) zone-bit recording,

The read/write channel functions include a time base generator, AGC circuitry, asymmetry correction circuitry (ASC), analog anti-aliasing low-pass filter, analog to digital converter (ADC), digital FIR filter, timing recovery circuits, Viterbi detector, sync mark detection, Iterative code ENDEC, serializer and de-serializer, and write pre- compensation circuits. Servo functions include servo data detection and PES demodulation. Additionally the 88C9410 contains specialized circuitry to perform various parametric measurements on the processed read signal. This allows for implementation of self-tuning and optimization capability in every drive built using the 88C9410.

A 12-bit NRZ interface is provided to support high speed data transfers and from the controller. Programming of the 88C9410 is performed through a serial interface. The serial interface is also used to read various channel parameters that are computed on the fly.

5.2.3.1Time Base Generator

The time base generator provides the write frequency and serves as a reference clock to the synchronizer during non-read mode.

5.2.3.2Automatic Gain Control

The AGC accepts a differential signal from the pre-amp, and provide constant output amplitude to the analog filter. It’s capable of accepting signal ranges from 50 mV to 400mVppd.

5.2.3.3Asymmetry Correction Circuitry (ASC)

The ASC circuit is designed to correct for amplitude asymmetry introduced by MR heads. The compensation range of this circuit is +/-30%. This circuit allows optimal bias current to be used independent of the asymmetry effect.

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 Manual Organization ScopeUser Definition Reference SataIntroduction DescriptionKey Features Hardware Requirements Standards and RegulationsSpecification Summary SpecificationsPhysical dimensions Physical SpecificationsLogical Configurations Physical SpecificationsPerformance Specifications Rated Power consumptionPower consumption Power RequirementsRotational Shock Environmental SpecificationsEnvironmental Specifications Linear Shock 1/2 sine pulse1Measurement Position Annualized Failure Rate AFR Reliability SpecificationsSpace Requirements InstallationMounting Unpacking InstructionsOrientation Mounting DimensionsSata Connectivity Cable ConnectorsVentilation 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 InstallationDisk Drive Operation Head / Disk Assembly HDABase Casting Assembly DC Spindle Motor AssemblyCoverAssembly Air Filtration System Disk Stack AssemblyHead Stack Assembly Voice Coil Motor and Actuator Latch AssembliesDisk Controller Digital Signal Process and Interface ControllerDrive Electronics DDR Buffer Control Block Host Interface Control BlockFrequency Synthesizer Disk Control BlockDisk Ldpc Control Block Automatic Gain Control Power ManagementRead/Write IC Time Base GeneratorAnalog to Digital Converter ADC and FIR Analog Anti-Aliasing Low Pass FilterRead Channel Servo SystemRead and Write Operations Read Caching Firmware FeaturesWrite Channel Write Caching 6 APM Defect ManagementAutomatic Defect Allocation SmartSata Terminology Sata II InterfaceSpinpoint M8-DVR Disti Product Manual REV Signal Descriptions Physical Interface Signal SummaryRegisters When read When written2 I/O Register Address Control Block Register DescriptionsCommand Block Register Descriptions Device Register Ex F6h Command Register Ex F7hStatus Register Ex F7h Auto-Activate in DMA Setup FIS Sata II Feature SETDevice Activity Signal Staggered Spin-up Disable ControlPhy. Event Counters Sata Power Management Software Settings PreservationCommand Code Parameters ATA Command DescriptionsCommand Table Smart Download Micro Code 92h Command DescriptionsCheck Power Mode E5h Device Configuration Overlay B1hDevice Configuration Identify data structure Word Content Format Track 50h Execute Device Diagnostics 90hDiagnostic Codes Flush Cache E7h, EAh extendedIdentify Device information Content Description=the fields reported in word 88 are valid EXT =Media Card Pass Through command feature set supported WWN Word Content DescriptionIdle Immediate E1h Automatic Standby Timer PeriodsIdle E3h Read DMA C8h, 25h extended Initialize Device Parameters 91hNOP 00h Read Buffer E4hRead Long 22h Read Multiple Command C4h, 29h extendedRead Log Extended 2Fh Read Verify Sectors 40h, 41h extended Read Native Max Address F8h, 27h extendedRead Sectors 20h, 24h extended Security Erase Unit F4h Security Disable Password F6hRecalibrate 10h Security Erase Prepare F3hSecurity Freeze Lock F5h Security Set Password F1hSecurity Erase Unit Password Security Set Password data contentSeek 7xh Set Features EFhIdentifier Level Command result Security Unlock F2h12 Transfer Mode Values 11 Set Features Register DefinitionsSleep E6h Set Multiple Mode C6h13 Set Max Feature Register Values Set Max Address F9h, 37h extendedSmart B0h 14 Smart Feature Registers ValuesSmart disable operations D9h Smart enable/disable attribute auto-save D2hSmart 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 write log sector D6h Smart read log sector D5hSmart return status DAh Write Fpdma Queued 61h Standby Immediate E0hWrite Buffer E8h Write DMA CAh, 35h extendedWrite Sectors 30h, 34h extended Write Multiple Command C5h, 39h extendedWrite Long 32h Spinpoint M8-DVR Disti Product Manual REV General Information MaintenanceMaintenance Precautions 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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