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5.2.2 Interfacing Phases
Interfacing in each communication mode is divided into several phases. In addition, there is a phase for mode initialization, as
well as a phase for mode switching. Interface signals may differ in name and function for different modes and different phases.
Aborted
Transfer
Termination from
Other Modes
(except EPP)
Compatibility Mode
*Forward
Data
Transfer
Host Xmits
Data
End forward
Data Xfer
Forward Idle
Termination
Event 1
Failed
Negotiation
Event 6
Negotiation
Event 6
Event 11
Host Busy
Data Not
Available
Event 11
Reverse
Data
Transfer
Host Busy
Data
Available
Event 7
Event 7
Event 18
Reverse Idle
Interrupt
Host
Event 21
