Interfacing Phases - Citizen PPU-700 Command Reference Manual

4.2.2 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.
*Forward
Data
Transfer
Host Busy
Data Not
Available
Event 7
Compatibility Mode
Host Xmits
Data
End forward
Data Xfer
Event 6
Event 11
Reverse
Idle
Aborted
Transfer
Forward
Idle
Failed
Event 1
Negotiation
Negotiation
Event 11
Reverse
Data
Transfer
Event 7
Interrupt
Host
Event 18
- 166 -
Termination from
Other Modes
(except EPP)
Termination
Event 6
Host Busy
Data
Available
Event 21