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4.4.8 OBJECT POSITION command
The following table shows the normal sequence of the OBJECT POSITION command when used with this
scanner.
Step
Bus phase
I
BUS FREE
2
ARBITRATION
3
SELECTION
4
MESSAGE OUT
5
COMMAND
6
STATUS
7
MESSAGE IN
8
BUS FREE
Table 4-20
Initiator operation
Verifies bus free
Obtains bus-usage
right
Selects target
Selects logical unit
POSITION (CDB)
Specifies OBJECT
← ← → →
→
Drives BSY signal
→
→
Loads/unloads paper (ADF)
←
←
Reports message (Command Complete)
4-43
Target operation
Reports GOOD status
Release BSY signal
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