EPSON Stylus Photo 750 Revision A
Product Description Parallel Interface 16

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