Table 1-6 Pin Assignments For The Parallel Interface - Epson DFX-8000 Service Manual

General
Description
Table 16. Pin Assignments for the Parallel Interface
Slgnal Return
Pln No. Pin No.
1 19
2 20
3 21
4 22
5 23
6 24
7 25
8 26
9 27
10 28
11
29
12
30
13
14
15
16
17
18
1-22
Slgnal
I STROBE pulse to read in data. Pulse width must
-STROBE
be more than 0.5 /IS at the receiving terminal.
I These signals represent information of the first to
DATA 1
DATA 2 I eighth bits of parallel data, respectfvely. Each
I signal is at HIGH level when data is logical 1 and
DATA 3
DATA 4 I LOW when data is logical 0.
I
DATA 5
DATA 6 I
I
DATA 7
DATA 8 I
-ACKNLG 0 Approximately a 12 m pulse. LOW indicates that
data has been received and that the printer is ready
to accept more data.
0 A HIGH signal indicates that the printer cannot
BUSY
receive data. The signal becomes HIGH in the
following cases:
l
l
l
l
PE 0 A HIGH signal indicates that the printer is out of
Pulled up to +5 V through 3.3 K ohm resistor.
SLCT
When this signal is LOW, the paper is automatically
-AUTO I
fed one line after printing. (The signal level can be
-FEED XT
fixed to LOW by turning on DIP switch 2-4.)
Not used.
NC
GND
CHASSIS Printer chassis GND. In the printer, the chassis
GND and the logic GND are isolated from each
GND
other.
NC
Twisted-pair return signal GND level.
GND
During data entry
During printing
When off line
During a printer error state
DFX-8000