Silicon Image SSD-H16G(I)-3500 manual Read Sector 20h, 21h

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ATA COMMAND BLOCK AND SET DESCRIPTION

SSD-HXXX(I)-3500 DATA SHEET

Read Sector — 20h, 21h

The Read Sector command allows the host to read sectors 1 to 256 as specified in the Sector Count register. If the sector count is set to 0h, all 256 sectors of data are made available. When the command code is issued and the first sector of data has been transferred to the buffer, the DRQ bit is set. The Read Sector command is terminated by writing the cylinder, head, and sector number of the last sector read in the task file. On error, the read operation is aborted in the errant sector.

Table 44: Read Sector — 20h, 21h

Register	D7	D6	D5	D4		D3	D2	D1	D0
Feature					X

Sector Count				Sector Count

Sector Number			Sector Number (LBA7-0)

Cylinder Low			Cylinder Low (LBA15-8)

Cylinder High			Cylinder High (LBA23-16)

Drive Head	1	LBA	1	Drive		Head Number (LBA27-24)

Command				20h or 21h

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FEBRUARY 2, 2009

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Contents Overview FeaturesRevision History UpdatedDocument No Release Date Changes AddedTable of Contents SSD-HXXXI-3500 Data Sheet Related Documentation Sales and Support Part NumberingList of Figures List of Tables Idle Immediate 95h, E1h Part Numbering Nomenclature Physical Dimensions Physical SpecificationsPin Locations System Performance Product SpecificationsSystem Power Requirements Operational Life Span SiliconDrive Part# Capacity Service Life GB Written per DayReliability Product Capacity Number Bytes Sectors Cylinders Heads Track Product Capacity SpecificationsEnvironmental Specifications Pin Electrical SpecificationPin Assignments Signal Name Pins Type Description Signal DescriptionsData Inputs/Outputs. This is the 8-bit or Disk Active/Slave Present. This openController by -IORD and -IOWR. This signal DMA Request. This signal is used for DMAGround. The device ground signal Interrupt Request. This signal is an activeSymbol Parameter Minimum Maximum Units Device Power Supply. The device powerSymbol Parameter Maximum Units Absolute Maximum RatingsSymbol Parameter 5V ±10% Units Minimum Maximum DC CharacteristicsO Access Read Timing Access Read TimingO Access Write Timing Access Write TimingTrue IDE Read/Write Access Timing True IDE Read/Write Access TimingTrue IDE Multiword DMA Read/Write Access Timing True IDE Multiword DMA Read/Write Access TimingCS0# CS1# DA02 DA01 DA00 Task File Register SpecificationATA and True IDE Register Decoding ATA Registers Error RegisterOperation Feature RegisterRead/Write ByteSector Count Register Read/Write Sector Count Default ValueLogical Block Number bits A07-A00 LBA Addressing Sector Number RegisterRead/Write Logical Block Number bits A15-A08 LBA Addressing Cylinder Low RegisterLow Logical Block Number bits A23-A16 LBA Addressing Cylinder High RegisterLBA27 LBA26 LBA25 LBA24 Drive/Head RegisterCorrected Data CORR. Always set to Drive Write Fault DWF. Always set toStatus Register Operation Read/Write ATA Command Code Command RegisterAlternate Status Register NIEN Bits Description Device Control RegisterOperation Write Device Address Register Read/Write NWTG NHS3 NHS2 NHS1 NHS0 NDS1 NDS0 Default ValueATA Command Block and Set Description ATA Command Block and SET DescriptionATA Command Set Class Command Name Registers Used CodeATA Command Set Register Check Power Mode 98h, E5hCheck Power Mode 98h, E5h Executive Drive Diagnostic 90h Executive Drive Diagnostic 90hFormat Track 50h Drive Head Number LBA27-24 Command 50hFormat Track 50h Identify Drive ECh Identify Drive EChIdentify Drive Drive Attribute Data Word Data Default Bytes Data Description AddressIdentify Drive Drive Attribute Data Identify Drive Drive Attribute Data Idle 97h, E3h Idle 97h, E3hIdle Immediate 95h, E1h Idle Immediate 95h, E1hInitialize Drive Parameters 91h Initialize Drive Parameters 91hRecalibrate 1Xh Drive Command 1XhRecalibrate 1Xh Read Buffer E4h Read Buffer E4hRead DMA C8h Drive Head Number LBA27-24 Command C8hRead DMA C8h Read Multiple C4h Drive Head Number LBA27-24 Command C4hRead Multiple C4h Read Sector 20h, 21h Drive Head Number LBA27-24 Command 20h or 21hRead Sector 20h, 21h Read Long Sectors 22h, 23h Drive Head Number LBA27-24 Command 22h or 23hRead Long Sectors 22h, 23h Read Verify Sectors 40h, 41h Drive Head Number LBA27-24 Command 40h or 41hRead Verify Sectors 40h, 41h Seek 7Xh Drive Head Number LBA27-24 Command 7XhSeek 7Xh Set Features EFh Set Features EFhSet Features’ Attributes Feature OperationSet Multiple Mode C6h Set Multiple Mode C6hSet Sleep Mode 99h, E6h Set Sleep Mode 99h, E6hStandby 96h, E2h Standby 96h, E2hStandby Immediate 94h, E0h Standby Immediate 94h, E0hWrite Buffer E8h Write Buffer E8hWrite DMA CAh Drive Head NumberLBA27-24 Command CAhWrite DMA CAh Write Multiple C5h Drive Head NumberLBA27-24 Command C5hWrite Multiple C5h Write Sectors 30h, 31h Drive Head Number LBA27-24 Command 30h or 31hWrite Sectors 30h, 31h Write Long Sectors 32h, 33h Drive Head Number LBA27-24 Command 32h or 33hWrite Long Sectors 32h, 33h Erase Sectors C0h Drive Head Number LBA27-24 Command C0hErase Sectors C0h Extended Error Codes Description Extended Error CodesRequest Sense 03h Request Sense 03hTranslate Sector 87h Drive Head Number LBA27-24 Command 87hTranslate Sector 87h Wear-Level F5h Wear-Level F5hWrite Multiple w/o Erase CDh Drive Head Number LBA27-24 Command CDhWrite Multiple w/o Erase CDh Write Sectors w/o Erase 38h Drive Head Number LBA27-24 Command 38hWrite Sectors w/o Erase 38h Write Verify 3Ch Drive Head Number LBA27-24 Command 3ChWrite Verify 3Ch Part Numbering Sales and SupportPart Numbering Nomenclature 3500Part Number Capacity Part NumbersRelated Documentation Related Documentation