Parallel interface specification – Epson C82314 User Manual
Page 15
PARALLEL INTERFACE SPECIFICATION
The C82314* coax interface provides a Centronics parallel data input port to allow
automatic sharing of the Epson printer between the 3270 host and an alternate
host. The parallel interface was designed to be compatible with popular printer
interfaces found on personal
computers. The following is a description of
the
parallel interface signals:
PARALLEL INTERFACE SPECIFICATIONS
Signal
Pin
Return
Pin
Signal
Parallel
Cable
Pin
Direction
Description
1
19
STROBE
1
IN
Strobe pulse to
read data in. Pulse
width must be
more than .5 µsec.
at the interface
2
20
DATA1
2
IN
These signals
3
21
DATA2
3
IN
represent infor-
4
22
DATA3
4
IN
mation in bits 1 to
5. 23
DATA4
5
IN
8 of parallel data
6
24
DATA5
6
IN
respectively. Each
7
25
DATA6
7
IN
signal is HIGH
8
26
DATA7
8
IN
when data is logical
9
27
DATA8
9
IN
1 and LOW when it
is logical 0.
10
28
ACKNLG
10
OUT
A LOW pulse with a
minimum width of 4
µsec. A low indi-
cates that data has
been received and
that the printer is
ready to accept
more data.
10