Scanner Interface
Appendix A-48
A.4.6
TEST UNIT READY command
The following table shows the normal sequence of the TEST UNIT READY 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 TEST UNIT
READY (CDB)
→
6
STATUS
←
Reports GOOD status
7
MESSAGE IN
←
Reports message (Command
Complete)
Releases BSY signal
8
BUS FREE
(1)
TEST UNIT READY command: COMMAND phase (initiator
→
target)
The TEST UNIT READY command checks whether a logical unit is ready. This command does not
request self-test. The acknowledgment of this command reported using the status and sense data.
The CDB of this command is shown in the following illustration.
1
Byte 0
2
3
4
5
Operation code X’00’
(Reserved)
(Reserved)
Control byte
7
6
5
4
3
2
1
0
Logical unit number
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 ...