Table 1-9. Parallel Interface Pin Assignments - Epson C11C605001 - DFX 9000 B/W Dot-matrix Printer Service Manual

Service Manual
Reverse Mode
1.3.1.2
The reverse mode for EPL-9000 supports the nibble mode of IEEE-P1284. This printer can run in
reverse mode, in which the printer can inform the computer of its status by EJL and PJL
commands.
System:
Connector type:
57-30360 (Amphenol or equivalent)
Applicable plug:
Signal description: See Table 1-9.

Table 1-9. Parallel Interface Pin Assignments

Pin No. Signal Name
1 STROBE
2-9
DATA
1-8
10 ACKNLG
11 BUSY
12
PE
13
14 AUTO-FEED
NC
16
17 CHASSIS GND
18
NC
19-30
31
INIT
32
ERROR
33
34 NC
35 +5
36
Rev. A
IN
request values from the host computer during negotiation.
The signals are data
This printer supports following values:
negotiation.
IN
0000 0100: Request Device ID (by nibble mode sending)
0000 0000: Request nibble mode
OUT
to host computer.
transfer to host computer.
host computer.
HostBusy: This signal informs the printer of the host computer
IN
state. When the signal is HIGH, the host computer cannot
accept data.
Not used.
Logic ground level.
Connected to the printer chassis. The printer chassis GND
-
and the signal GND are connected to each other.
Not connected.
.
Ground level for the twisted pair return signal.
IN
transfer to host computer.
.
Same as for pins19 to 30.
Not
Pulled up to +5V through 1.0 Kohm resistance.
1284Active: If this signal is set to HIGH, this printer active
IN
General Description
Description
bits of extension request values during
1-13