Fujitsu 600C manual Release Unit command Command phase initiator → target, TP third party Byte

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4.4.2RELEASE UNIT command

The following table shows the normal sequence of the RESERVE UNIT command when used with this scanner.

Table 4-9RELEASE UNIT command

Step	Bus phase	Initiator operation	←→	Target operation

1	BUS FREE	Verifies bus free

2	ARBITRATION	Obtains bus-usage right

3	SELECTION	Selects target	→

				Drives BSY signal

4	MESSAGE	Selects local unit	→
	OUT

5	COMMAND	Specifies RELEASE	→
		UNIT (CDB)

6	STATUS		←	Reports GOOD status

7	MESSAGE IN		←	Reports message (Command Complete)

				Releases BSY signal

8	BUSFREE

4.4.2.1RELEASE UNIT command: COMMAND phase (initiator → target)

The RELEASE UNIT command releases a reserved status. If this command comes from an initiator that has not declared reservation, the target ignores the command and responds with the GOOD status (the reserved status is not released).

The CDB of this command is shown in the following illustration.

Byte 0

1

2

3

4

5

7	6	5	4	3	2	1	0
			Operation code X'17'

	Logical unit number		TP		TPID		(Reserved)

(Reserved)

Control byte

(a) TP (third party): Byte 1

4-21

Image 49

Contents Version Page Table of Contents Diagnostics Group 3 error flowchart no paper in ADF paper tray Page General GeneralSystem Block Diagram Outer View Device ConfigurationComponents Functional Specifications Remarks Functional SpecificationsEnvironmental Specifications Remarks Environmental SpecificationsRemoving the Shipping Bracket OperationRemove the shipping retainer Fasten the shipping retainer Indication Panel Power On/OffNames and functions of the indicators Setting the Scsi ID and Connecting the Interface CableScsi ID setting Name Color FunctionScsi Cable Connection Position Paper Size Paper SpecificationsPaper conditions 2.1 ADFItems to avoid FIatbedADF readable area 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 document on the ADF paper chute Placing the documents on the ADF paper chuteSeparating the sheets for easy feeding Angling the document sheetsCleaning the document cover and the document glass CleaningCleaning inside the ADF Page Interface ∙ Busy ∙ Check Condition ∙ Good ∙ Reservation Conflict Connection Physical SpecificationsSpecifications Physical Specification1SCSI physical specifications TerminationPin assignments Signal Name Pin NumberSystem configuration System configurationScsi Bus Addresses of Scsi devices2Bus signals Bus signals3Bus phases vs. signal drive sources 1/2 Bus signal drive conditionsMethod 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 transfer from target to initiator Asynchronous information transferAsynchronous transler from initiator to target Relative addressing is not supported CommandsControl byte is not supported Commands Reserve Unit commandOperation Command Code hex Description 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 Inquiry command Command phase initiator → target Inquiry command10 Inquiry command Step Bus phase Initiator operation Target operationCode Byte Evpd enable vital product data ByteCAllocation length Byte Aenc Inquiry data Data in phase target → initiatorADF mode Byte 24, bit SftRst Soft Reset ByteColor mode Byte 24, bit 6 to ISO version, Ecma version, Ansi approved version ByteRequest Sense command Command phase initiator → target Request Sense command11 Request Sense command Error code Byte Sense data Data EN phase target → initiatorAllocation length Byte Valid ByteFM file mark Byte ILI incorrect length indicator ByteEOM end of medium Byte Sense key ByteCommand-specific information bytes Bytes 8 to B Send Diagnostic commandSense Additional Description 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 Acknowledgment Test Unit Ready command Command phase initiator → targetSET Window command Command phase initiator → target SET Window commandTransfer Length Bytes 6 to Window date Data OUT phase initiator → targetHeader Window descriptor block Window identifier Byte Y resolution XR, YR Bytes 2 to 3 and 4 toAuto Byte Upper left X,YULX, ULY Bytes 6 to 9, a to DRemarks Brightness ByteRIF reverse image format Byte 1D, bit Bit per pixel Byte 1ABit ordering Bytes 1E to 1F Halftone pattern Bytes lB to 1C lB reserved7.4 B&W Scanning Vender unique parameters Update of ScanPartner 600C OEM manualCompression type, argument Bytes 20 to 18 Vender unique parameters byte 28 and laterPage 19 Vendor unique parameters byte 28 and later Color Scanning Vender unique parametersADF Byte 2A, Bit Source Byte 2A, BitShadow value Byte 2C Highlight value Byte 2BLine width Byte 2D to 2E Line count Byte 2F toObject Position command Position type Byte Object Position command Command phase initator → targetBit Load object Unload objectCount Bytes 2 to NormalStep Bus phase Initiator operation Target operation Read commandADF sequence Data type code Byte Read command Command phase initiator → targetData type qualifier Bytes 4 to Transfer length TL Bytes 6 toImage data Data Type Code = Data in phase target → initiatorFor binary data Pixel size data Data Type Code =Scan Command phase initiator → target Scan commandCode Status of unit Status Status phase target initiatorMessages 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 BUS Device Reset X0C Message OUT phase initiator → target No Operation X08 Message OUT phase initiator → targetPhase when ATN is detected Action Message rejected ActionIdendify X80 to XFF Message OUT phase initiator → target Initial sequence Command SequenceRead sequence for B&W mode Read command sequenceRead sequence Single ReadMultiple Read Status Transition of Logical Unit Sense key Error TableItems for Specifying Window Page Ready LED Paper Jam LED Error indication Online diagnosticsOnline diagnostics Offline diagnostics results Offline diagnosticsGroup 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