FUJITSU SCANPARTNER 600C - Manual (Page 71)

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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.
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