•
SIGNAL NAME
FUNCTION
IN/OUT
J3
PIN
DB25f
PIN
-STROBE
Output data strobe
out
1
1
Data 0
Data bit (LSB)
I/O
3
2
Data 1
I/O
5
3
Data 2
•.
I/O
7
4
Data 3
.
I/O
9
5
Data 4
•.
I/O
11
6
Data 5
I/O
13
7
Data 6
•.
I/O
15
8
Data 7
Data bit (MSB)
I/O
17
9
-ACK
Character accepted
in
19
10
BUSY
Cannot receive data
in
21
11
PAPER EMPTY
Out of paper
in
23
12
SEL OUT
Printer
selected
in
25
13
-AUTOFD
Auto feed
out
2
14
-ERROR
Printer error
in
4
15
-INIT
Initialize printer
out
6
16
-SEL IN
Selects printer
out
8
17
-POE
Port output enable
in
26
--
GND
Signal ground
---
10, 12
18-25
14, 16
18, 20
22, 24
•
•
956 Manual
August 1994
3.3.4 P a r a l l e l Port Configuration and Connection
Table 3-16 lists the connector pin assignments for the parallel port at J3. I n addition to the pins of
connector J3, Table 3-16 also lists the corresponding pins for the DB25F parallel connector cable
supplied with the unit. T h e pinout of J3 is such that it allows the use of a flat ribbon cable between J3
and a PC/AT compatible DB25F parallel connector.
Table 3-16. J3 Pin Assignments
Beyond the choice of I/O base address and interrupt described in the previous sections, there is only
one jumper that affects the parallel port at J3. This
is
W20, which controls whether the parallel port
will function as a standard PC/AT printer port (output only) or as a bidirectional data port.
3-13
