Epson EPI-4000 User Manual page 214

Pin assignments for the parallel interface
The following table provides the parallel interface connector pin
assignments and describes the interface signals.
Signal
Return
pin pin
19
2
20
3
21
4
22
5
23
6
24
7
25
8
26
9 27
10
28
11 29
Text
30
Text
7-20
Technical Specifications
Signal Direction Description
IN
STROBE
IN
DATA 1
DATA 2 IN
DATA 3
IN
DATA 4 IN
DATA 5
IN
DATA 6 IN
DATA 7 IN
DATA 8 IN
ACKNLG OUT
BUSY OUT
PE
OUT
SLCT OUT
The STROBE pluse to read the input
data. The pulse width should be more
than 0.5µs at the receiving terminal.
Input data is latched after the falling
edge of this signal.
These signals represent information in
the first to eighth bits of parallel data,
respectively. Each signal is HIGH when
data is logical 1 and LOW when it is
logical 0.
About an 11µs pulse. LOW indicate:;
that data has been received and that the
printer ready to accept more data
IS
This signal is paired with the BUSY
signal.
A HIGH signal indicates that the printer
cannot receive data. The signal goes
HIGH in the following cases:
• during data en:ry (for each
character)
• when the printer is off line
during a printer-error state.
l
A HIGH signal indicates that the printer
is out of paper. The signal is effective
only when the ERROR signal is low.
Pulled up to +5V through 3.3 Kohm
resistance.