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 HostCl k 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 sig nals are
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.