Silicon Image SSDS00-3650H-R manual Drive/Head Register, LBA27 LBA26 LBA25 LBA24

Page 33

ATA REGISTERS

SSD-HXXX(I)-3650 DATA SHEET

DRIVE/HEAD REGISTER

The Drive/Head register is used by the host and the device to select the type of addressing (CHS or LBA), the drive letter, and either bits 3-0 of the head number in CHS mode or logical block number bits 27-24 in LBA mode.

Table 23: Drive/Head Register

Operation	D7	D6	D5	D4	D3	D2	D1	D0
Read/Write	1	LBA	1	DRV	HS3	HS2	HS1	HS0
					LBA27 LBA26 LBA25 LBA24
Default	1	0	1	0	0	0	0	0
Value

The Drive/Head register is used by the host to specify one of a pair of ATA drives present in the platform.

Bit(s)	Description

6	LBA. Selects between CHS (0) and LBA (1) addressing mode.

4Drive Address (DRV). Indicates the drive number selected by the host, either 0 or 1.

3-0 HS3 to 0. Indicates bits 3-0 of the head number in CHS addressing mode or LBA bits 27-24 in LBA mode.

•CHS to LBA conversion: LBA = (C x HpC + H) x SpH + S -1

•LBA to CHS conversion:

C = LBA/(HpC x SpH)

H = (LBA/SpH) mod (HpC)

S = (LBA mod(SpH)) + 1

...where:

C is the cylinder number H is the head number S is the sector count

HpC is the head count per cylinder count SpH is the sector count per head count (track)

SILICONSYSTEMS PROPRIETARY

This document and the information contained within it is confidential and proprietary to SiliconSystems, Inc.

All unauthorized use and/or reproduction is prohibited.

DOCUMENT: 3650H-02DSR

JUNE 17, 2008

PAGE 21

Image 33

Contents Overview FeaturesSisecure Host and/or software IPUpdated Revision HistoryDocument No Release Date Changes Table of Contents SSD-HXXXI-3650 Data Sheet Related Documentation Sales and Support Part NumberingSSD-HXXXI-3650 Data Sheet List of Figures List of Figures List of Tables ATA Command Block and Set Description Write Long Sectors 32h, 33h SSD-HXXXI-3650 Data Sheet Physical Dimensions Physical SpecificationsPin Locations System Power Requirements Product SpecificationsSystem Performance System ReliabilityEnvironmental Specifications Product Capacity Specifications047,674,880 046,240 2030 098,446,336 098,528 4066Electrical Specification Pin AssignmentsPin 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 activeCapacitance 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 TimingTask File Register Specification ATA and True IDE Register DecodingCS0# CS1# DA02 DA01 DA00 ATA Registers Error RegisterFeature Register Read/Write Feature ByteOperation Sector Count Register Read/Write Sector Count Default ValueSector Number Register Read/WriteLogical Block Number bits A07-A00 LBA Addressing Cylinder Low Register LowLogical Block Number bits A15-A08 LBA Addressing Logical Block Number bits A23-A16 LBA Addressing Cylinder High RegisterLBA27 LBA26 LBA25 LBA24 Drive/Head RegisterDrive Write Fault DWF. Always set to Status RegisterCorrected Data CORR. Always set to Operation Read/Write ATA Command Code Command RegisterAlternate Status Register Device Control Register Operation WriteNIEN Bits Description 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 Check Power Mode 98h, E5h Check Power Mode 98h, E5hRegister Executive Drive Diagnostic 90h Executive Drive Diagnostic 90hDrive Head Number LBA27-24 Command 50h Format Track 50hFormat Track 50h Identify Drive ECh Identify Drive EChIdentify Drive Drive Attribute Data Word Data Default Bytes Data Description AddressIdentify Drive Drive Attribute Data Idle 97h, E3h Idle 97h, E3hIdle Immediate 95h, E1h Idle Immediate 95h, E1hInitialize Drive Parameters 91h Initialize Drive Parameters 91hDrive Command 1Xh Recalibrate 1XhRecalibrate 1Xh Read Buffer E4h Read Buffer E4hDrive Head Number LBA27-24 Command C8h Read DMA C8hRead DMA C8h Drive Head Number LBA27-24 Command C4h Read Multiple C4hRead Multiple C4h Drive Head Number LBA27-24 Command 20h or 21h Read Sector 20h, 21hRead Sector 20h, 21h Drive Head Number LBA27-24 Command 22h or 23h Read Long Sectors 22h, 23hRead Long Sectors 22h, 23h Drive Head Number LBA27-24 Command 40h or 41h Read Verify Sectors 40h, 41hRead Verify Sectors 40h, 41h Drive Head Number LBA27-24 Command 7Xh Seek 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 E8hDrive Head NumberLBA27-24 Command CAh Write DMA CAhWrite DMA CAh Drive Head NumberLBA27-24 Command C5h Write Multiple C5hWrite Multiple C5h Drive Head Number LBA27-24 Command 30h or 31h Write Sectors 30h, 31hWrite Sectors 30h, 31h Drive Head Number LBA27-24 Command 32h or 33h Write Long Sectors 32h, 33hWrite Long Sectors 32h, 33h Drive Head Number LBA27-24 Command C0h Erase Sectors C0hErase Sectors C0h Extended Error Codes Description Extended Error CodesRequest Sense 03h Request Sense 03hDrive Head Number LBA27-24 Command 87h Translate Sector 87hTranslate Sector 87h Wear-Level F5h Wear-Level F5hDrive Head Number LBA27-24 Command CDh Write Multiple w/o Erase CDhWrite Multiple w/o Erase CDh Drive Head Number LBA27-24 Command 38h Write Sectors w/o Erase 38hWrite Sectors w/o Erase 38h Drive Head Number LBA27-24 Command 3Ch Write Verify 3ChWrite Verify 3Ch Part Numbering Sales and SupportPart Numbering Nomenclature 3650Part Number Capacity Part NumbersStandard Back Label with Lot Related DocumentationFront Label Code Information Related DocumentationClick here