Epson LQ-570e, Service Manual, Page: 27 / 129

EPSON
LQ-570e/LQ-580
Revision
C
Product
Description
Interface
Specifications
27
1.4.2
Parallel Interface (Reverse Channel)
o
Transmission
mode:
IEEE-1284
nibble mode
o
Adaptable
connector:
See
1.4.1 "Parallel Interface (Forward Channel)"
o
Synchronization: Refer
to the IEEE-1284 specification
o
Handshaking: Refer
to the IEEE-1284 specification
o
Signal
level:
IEEE-1284
level 1 device
See
1.4.1 "Parallel Interface (Forward Channel)"
o
Data
transmission timing:
Refer
to the IEEE-1284 specification
o
Extensibility
request:
The
printer responds to the extensibility request
affirmatively,
when the request is 00H or 004H, which means;
00H:
Request for nibble mode of reverse channel transfer
04H:
Request device ID in nibble mode of reverse channel transfer
o
Device
ID: The printer sends following device ID string when it is requested.
n
Market
ID=0
*1
When
IEEE1284.4 is enabled;
When
IEEE1284.4 is disabled;
n
Market
ID=1
When
IEEE1284.4 is enabled;
When
IEEE1284.4 is disabled;
[00H][4EH]
MFG:
EPSON;
CMD:
ESCPL2,PRPXL24,BDC,D4;
MDL:
LQ-580;
CLS:
PRINTER;
DES:
EPSON[SP]LQ-580;
[00H][4BH]
MFG:
EPSON;
CMD:
ESCPL2,PRPXL24,BDC;
MDL:
LQ-580;
CLS:
PRINTER;
DES:
EPSON[SP]LQ-580;
[00H][50H]
MFG:
EPSON;
CMD:
ESCPL2,PRPXL24,BDC,D4;
MDL:
LQ-570e;
CLS:
PRINTER;
DES:
EPSON[SP]LQ-570e;
[00H][4DH]
MFG:
EPSON;
CMD:
ESCPL2,PRPXL24,BDC;
MDL:
LQ-570e;
CLS:
PRINTER;
DES:
EPSON[SP]LQ-570e;
Table
1-23. Connector Pin Assignment and Signals
Pin
No.
Signal
Name
Return
GND
Pin
In/Out Function
Description
1 HostClk 19 In Host
clock signal.
2 DATA1 20 In
Parallel
input data to the printer.
bit0:LSB
3 DATA2 21 In
bit1
4 DATA3 22 In
bit2
5 DATA4 23 In
bit3
6 DATA5 24 In
bit4
7 DATA6 25 In
bit5
8 DATA7 26 In
bit6
9 DATA8 27 In bit7:MSB
10 PtrClk 28 Out Printer
clock signal.