Fujitsu 600C Scsi Bus, System configuration, Addresses of Scsi devices, Peripheral equipment

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4.2 SCSI Bus

4.2.1System configuration

4.2.1.1System configuration

The SCSI bus connects up to eight SCSI units, each linked with a daisy chain. Both ends of the daisy chain require a terminator.

Each SCSI unit operates as an initiator or a target, so that a series of operations are performed between an initiator and target pair.

The system may be configured with any combination of initiators and targets as long as the number of the initiators and targets combined does not exceed eight.

4.2.1.2Addresses of SCSI devices

Every SCSI device on the bus is assigned a unique address (SCSI ID) that corresponds to the data bus bit number; ID#7 through ID#10 correspond to DB7 through DB0. The SCSI ID provides identification for specifying particular SCSI device when an initiator selects a target or when a target reconnects an initiator.

SCSI ID also represents the priority for using the bus in the arbitration phase. (A description regarding the bus phase is given later;) Priorities are given in the descending order of data bus bit numbers (DBn), with the highest priority placed on ID#7(DB7) and the lowest priority on ED#0(DB0).

4.2.1.3Peripheral equipment

With the basic specification, an initiator can designate up to eight peripheral devices (logical units) belonging tt a single target, where the peripheral devices are used as the I/O units of the initiator; Logical units are identified and selected by specifying their LUNs (logical unit numbers) in the IDENTIFY message or command (CDB: command descriptor block).

This scanner is equipped with a target and a logical unit, and its LUN is 000.

4-6

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Contents Version Page Table of Contents Diagnostics Group 3 error flowchart no paper in ADF paper tray Page General GeneralSystem Block Diagram Device Configuration Outer ViewComponents Functional Specifications Functional Specifications RemarksEnvironmental Specifications Environmental Specifications RemarksOperation Removing the Shipping BracketRemove the shipping retainer Fasten the shipping retainer Power On/Off Indication PanelScsi ID setting Setting the Scsi ID and Connecting the Interface CableNames and functions of the indicators Name Color FunctionScsi Cable Connection Position Paper conditions Paper SpecificationsPaper Size 2.1 ADFFIatbed Items to avoidReadable area ADF readable areaWhen the document size is of letter/A4 size or smaller Document Setting MethodFlatbed Setting the ADF paper chute When the document is a thick book2 ADF Placing the documents on the ADF paper chute Placing the document on the ADF paper chuteAngling the document sheets Separating the sheets for easy feedingCleaning Cleaning the document cover and the document glassCleaning inside the ADF Page Interface ∙ Busy ∙ Check Condition ∙ Good ∙ Reservation Conflict Physical Specifications Connection1SCSI physical specifications Physical SpecificationSpecifications TerminationSignal Name Pin Number Pin assignmentsScsi Bus System configurationSystem configuration Addresses of Scsi devicesBus signals 2Bus signalsBus signal drive conditions 3Bus phases vs. signal drive sources 1/2Method of driving the interface signal Bus PhasesOr connection Nonor connection 5Signal delay times definition Time Definition Signal delay times definition BUS Free phaseTime Definition Arbitration phase BSY Scsi SEL Selection phase Information Transfer phase type Phase Information Transfer phasesDB7 to 9,P Transfer Direction Asynchronous information transfer Asynchronous transfer from target to initiatorAsynchronous transler from initiator to target Relative addressing is not supported CommandsControl byte is not supported Operation Command Code hex Description Reserve Unit commandCommands Bit and field described as Reserved areTP third party Byte Reserve Unit command Command phase initiator Õ targetTpid third party device ID Byte Release Unit command Command phase initiator → target Release Unit commandTP third party Byte 10 Inquiry command Inquiry commandInquiry command Command phase initiator → target Step Bus phase Initiator operation Target operationCode Byte Evpd enable vital product data ByteCAllocation length Byte Inquiry data Data in phase target → initiator AencColor mode Byte 24, bit 6 to SftRst Soft Reset ByteADF mode Byte 24, bit ISO version, Ecma version, Ansi approved version ByteRequest Sense command Command phase initiator → target Request Sense command11 Request Sense command Allocation length Byte Sense data Data EN phase target → initiatorError code Byte Valid ByteEOM end of medium Byte ILI incorrect length indicator ByteFM file mark Byte Sense key ByteSense Additional Description Send Diagnostic commandCommand-specific information bytes Bytes 8 to B Sense codePF page format Byte Send Diagnostic command Command phase initiator → targetSlftst selftest Byte Contents of self-test Test Unit Ready commandResults of self-test Test Unit Ready command Command phase initiator → target AcknowledgmentSET Window command SET Window command Command phase initiator → targetTransfer Length Bytes 6 to Window date Data OUT phase initiator → targetHeader Window descriptor block Auto Byte Y resolution XR, YR Bytes 2 to 3 and 4 toWindow identifier Byte Upper left X,YULX, ULY Bytes 6 to 9, a to DBrightness Byte RemarksBit ordering Bytes 1E to 1F Bit per pixel Byte 1ARIF reverse image format Byte 1D, bit Halftone pattern Bytes lB to 1C lB reservedCompression type, argument Bytes 20 to Update of ScanPartner 600C OEM manual7.4 B&W Scanning Vender unique parameters 18 Vender unique parameters byte 28 and laterPage ADF Byte 2A, Bit Color Scanning Vender unique parameters19 Vendor unique parameters byte 28 and later Source Byte 2A, BitLine width Byte 2D to 2E Highlight value Byte 2BShadow value Byte 2C Line count Byte 2F toObject Position command Position type Byte Object Position command Command phase initator → targetBit Count Bytes 2 to Unload objectLoad object NormalStep Bus phase Initiator operation Target operation Read commandADF sequence Data type qualifier Bytes 4 to Read command Command phase initiator → targetData type code Byte Transfer length TL Bytes 6 toFor binary data Data in phase target → initiatorImage data Data Type Code = Pixel size data Data Type Code =Scan command Scan Command phase initiator → targetStatus Status phase target initiator Code Status of unitMessages Phase ATN detection timingATN detection Message types Command Complete X00 Message in phase target → initiatorMessage Message Reject X07 Message IN/OUT phase initiator → target Abort X06 Message OUT phase initiator → targetATN detection phase Action Phase when ATN is detected Action No Operation X08 Message OUT phase initiator → targetBUS Device Reset X0C Message OUT phase initiator → target Message rejected ActionIdendify X80 to XFF Message OUT phase initiator → target Command Sequence Initial sequenceRead sequence Read command sequenceRead sequence for B&W mode Single ReadMultiple Read Status Transition of Logical Unit Error Table Sense keyItems for Specifying Window Page Ready LED Paper Jam LED Error indication Online diagnosticsOnline diagnostics Offline diagnostics Offline diagnostics resultsGroup 1 error flowchart Lamp assembly Diagnostic flowchartsGroup 2 error flowchart Flatbed/ADF motor Group 3 error flowchart paper in ADF paper tray Group 3 error flowchart no paper in ADF paper tray