A.4 Commands
Appendix A-41
A.4.4
REQUEST SENSE command
The
following table shows the normal sequence of the REQUEST SENSE command when used
with this scanner.
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 OUT
Selects logical unit
→
5
COMMAND
Specifies REQUEST
SENSE (CDB)
→
6
DATA IN
←
Reports sense data
7
STATUS
←
Reports GOOD status
8
MESSAGE IN
←
Reports message (Command
Complete)
Releases BSY signal
9
BUS FREE
(1)
REQUEST SENSE command: COMMAND phase (initiator
→
target)
The REQUEST SENSE command requests the sense data that shows the status of a logical unit. On
receiving this command, the target sets the unit•fs status in the sense data and returns it to the
initiator.
The CDB of this command is shown in the following illustration.
1
Byte 0
5
4
3
2
Operation code X’03’
Logical unit number
(Reserved)
(Reserved)
Control byte
7
6
5
4
3
2
1
0
Allocation length
Summary of Contents for M3097DG
Page 1: ...C150 E103 01EN M3097DG Image Scanner OEM Manual ...
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Page 44: ...3 3 Optional image function 3 23 ...
Page 67: ...5 4 Consumable 5 13 Two rollers are included Figure 5 4 Pick roller ...
Page 70: ...6 3 Figure 6 1 Jam clearance ...