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©00001￿ (CHECK CONDITION)

f Sense key: X©5￿ (ILLEGAL REQUEST)

b.TPID (third party device ID) : Byte 1 This scanner ignores TPID.

4.4.3INQUIRY 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

Æ

 

 

 

(CDB)

 

 

 

 

 

 

 

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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