CBM America iDP3240 manual Interfacing Phases

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.

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

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