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a. TP (third party) : Byte 1
As this scanner does not support the 3rd party reservation option, setting this
bit to 1 causes the target to return the following error information:
f Status: B©00001π (CHECK CONDITION)
f Sense key: X©5π (ILLEGAL REQUEST)
b. TPID (third party device ID) : Byte 1
This scanner ignores TPID.
4.4.3 INQUIRY command
The following table shows the normal sequence of the INQUIRY command when
used with this scanner.
Step Bus phase Initiator operation ¨ Æ Target operation
1 BUS FREE Verifies bus free
2 ARBITRATION Obtains bus>usage
right
3 SELECTION Selects target Æ
Drives BSY signal
4 MESSAGE OUT Selects logical unit Æ
5 COMMAND Specifies INQUIRY
(CDB)
Æ
6 DATA IN ¨ Reports inquiry data
7 STATUS ¨ Reports GOOD status
8 MESSAGE IN ¨ Reports message (Command
Complete)
Releases BSY signal
9 BUS FREE
(1) INQUIRY command: COMMAND phase (initiator Æ target)
The INQUIRY command used to check information regarding a target and logical
unit.
The CDB of this command is shown in the following illustration.
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