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A.4 Commands
Appendix A-81
A.4.10 SEND command
The following table shows the normal sequence of the SEND 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 SEND
(CDB)
→
6 DATA OUT
→
Transfer data
7 STATUS
←
Reports GOOD status
8 MESSAGE IN
←
Reports Command Complete
Releases BSY signal
9 BUS FREE