Interfacing Phases - Citizen CBM-1000 User Manual

13.1.2 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.
*Forward
Data
Transfer
Host Busy
Data Not
Available
Event 7
Compatibility Mode
Host Xmits
Data
Forward
End forward
Data Xfer
Negotiation
Event 6
Reverse
Event 11
Transfer
Reverse
idle
Event 18
—161 —
Aborted
Transfer
Termination
idle
Failed
Negotiation
Event 1
Event 6
Event 11
Data
Event 7
Interrupt
Host
Termination from
Other Modes
(Except EPP)
Host Busy
Data
Available
Event 21