A.4 Commands

Note:

Front-side subwindow or back-side subwindow is specified by subwindow identifier. This scanner can use both front-side and back-side subwindow data.

If the scanner uses front-side and back-side subwindow at a time, those subwindow data must be set by on SET SUBWINDOW command.

Up to four subwindows

#1

 

#2

 

 

 

 

#4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Subwindow descriptor block

Header

a.Header

Subwindow data (header) is shown in the following illustration.

7

6

5

4

3

2

1

0

Byte 0

(Reserved)

5

6(MSB)

Window descriptor block length

7

 

(LSB)

 

(a)Subwindow descriptor block length: Bytes 6 and 7

Specifies the length in bytes of a subwindow descriptor block. Each block has a same length. The allowable range of length is between 40 and 64 bytes. For a length outside this range, this scanner returns the following error information:

∙ Status:

B’00001’ (CHECK CONDITION)

∙Sense key: X’5’ (ILLEGAL REQUEST)

b.Subwindow descriptor block

Subwindow data (window descriptor block) is shown in the following illustration.

Appendix A-71