Epson Photo750 manual Connect pin assignment and signals, Xflag Out

EPSON Stylus Photo 750 Revision A

„When IEEE1284.4 protocol is NOT effective: [00H] [57H]

MFG:EPSON;

CMD:ESCPL2,BDC;

MDL:Stylus[SP]Photo[SP]750;

CLS:PRINTER;

DES:EPSON[SP]Stylus[SP]Photo[SP]750;

NOTE: [00H] denotes a hexadecimal value of zero. [SP] denotes a space character(20H).

MDL and DES values depend on the EEPROM setting.

Table 1-9. Connect pin assignment and signals

Pin.	Signal	Return	In/Out	Function Description
No	Name	GND pin
1	HostClk	19	In	Host clock signal.
				The DATA 0 through DATA7 signals
				represent data bits 0-7,
				respectively.Eacj signal is at high level
2-9	Data0-7	20-27	In	when data is logical 1 and low level
				when data is logical 0. These signals are
				used to transfer the 1284 extensibility
				request values to the printer.
10	PtrClk	28	Out	Printer clock signal.
11	PtrBusy/	29	Out	Printer busy signal and reverse channel
	DataBit-3,7			transfer data bit3 or 7.
12	AckDataReq/	28	Out	Acknowledge data request signal and
	DataBit-2,6			reverse channel transfer data bit2 or 6.
13	Xflag/	28	Out	X-flag signal and reverse channel
	DataBit-0,4			transfer data bit 1 or 5.
14	HostBusy	30	In	Host busy signal.
31	-INIT	30	In	Not used.
32	-DataAvail/	29	Out	Data available signal and reverse
	DataBit-0,4			channel transfer data bit 0 or 4.
36	1284-Active	30	In	1284 active signal.
18	Logic H	---	Out	Pulled up to +5V via 3.9K ohm resistor.
35	+5V	---	Out	Pulled up to +5V via 3.3 K ohm resistor.
17	Chassis	--	--	Chassis GND.
	GND
16,33	GND	---	---	Signal GND.
19-30
15,34	NC	---	---	Not connected.

Product Description Parallel Interface 16