Fujitsu C145-C037-01EN manual Not used

Table 5.1 Parallel interface signals (continued)

Connector	Return			Signal
pin	line pin	Compati mode				Direction		Description
number	number				Nibble mode
15	–				–	–	Not used
16	–	Signal Ground (SG)				–	Logic ground level (0 V)
17	–	Frame Ground (FG)				–	Printer chassis ground line
							FG and SG are connected.
18	–				–	–	Not used
19 to 30	–	Signal Ground (SG)				–	Twisted-pair return lines
31	30					Input	Reserved (*1)
			Input Prime
		(IN PRM)
32	29					Output	This signal goes low under the following printer
		Fault
							conditions:
							(1)	Offline
							(2)	Paper out
							(3) Cover open
							(4)	Other printer error
				Data Available			Reverse data transfer phase:
							This signal is set low when the printer is ready to
							send data to the host. During the data transfer, it is
							used as data bit 0 (LSB), then data bit 4.
							Reverse idle phase:
							This signal is used to indicate that data is available.
33	–				–	–	Not used
34	–				–	–	Not used
35	–	+5 V				Output	Pulled up to +5 V through a 1.0 kΩ resistor
36	30	(Select In)				Input	Reserved (*1)
				1284 Active			This signal goes high to cause the printer to enter the
							reverse data transfer phase (nibble mode).

*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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