Fujitsu C145-C037-01EN manual Nibble mode Input Reserved *1

Table 5.2 Parallel interface signals (continued)

Connector	Return		Signal
pin	line pin	Compati mode		Direction	Description
number	number		Nibble mode
17	35			Input	Reserved (*1)
			Auto Feed XT
			Host Busy		Reverse data transfer phase:
					This signal is set low when the host can receive data,
					and goes high when the host has received data.
					Following a reverse data transfer, the interface enters
					the reverse idle phase when the Host Busy signal goes
					low and the printer has no data.
					Reverse idle phase:
					This signal goes high when the Printer Clock signal
					goes low so that the interface re-enters the reverse
					data transfer phase. If it goes high with the 1284
					Active signal low, the 1284 idle phase is aborted and
					the interface returns to the compatibility mode.
18	–		–	Input	Host Logic High
19 to 35	–	Signal Ground (SG)		–	Twisted-pair return lines
36	–		–	Output	Peripheral Logic High

*1 Assigned as a signal name, without any function.

Notes:

1.Left-aligned signal names are in compati mode and right-aligned ones are in nibble mode.

2.The direction (input and output) refers to the printer.

3.Return line: Twisted-pair return line connected to the signal ground level

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