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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.
4
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Содержание M3097G
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