4-43
4.4.8
OBJECT POSITION command
The following table shows the normal sequence of the OBJECT POSITION command when used with this
scanner.
Table 4-20
Step
Bus phase
Initiator operation
←
←→
→
Target operation
I
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 OBJECT
POSITION (CDB)
→
Loads/unloads paper (ADF)
6
STATUS
←
Reports GOOD status
7
MESSAGE IN
←
Reports message (Command Complete)
Release BSY signal
8
BUS FREE