PMDX-132 User’s Manual
PCB Revision: PCB-466A
Document Revision: 1.0
Serial Numbers: 23410 and above
PMDX-132_Manual_10.doc
©2008 Practical Micro Design, Inc.
Page 16 of 24
17 April 2008
All Rights Reserved
NOTE –
Some printer cables do not have good signal shielding. Some cables also omit some of
the status or control signals (such as “
~Auto Feed
” and “
Select Out
”, 25-pin “D”
connector pin numbers 14 and 13, respectively). We recommend using cables that
are listed as IEEE-1284 compliant.
Pin Numbers
Direction
PC
(note 1)
J6
(note 2)
J7
(note 3)
PC Signal
Name
(relative
to the PC)
PMDX-132
Signal
Comment
1
1
1
~Strobe
out
Output “pin 1” and
relay K1 control
Isolated and buffered
output
2
2
3
Data 0
out
Dir signal to Gecko #1
3
3
5
Data 1
out
Step signal to Gecko #1
4
4
7
Data 2
out
Dir signal to Gecko #2
5
5
9
Data 3
out
Step signal to Gecko #2
6
6
11
Data 4
out
Dir signal to Gecko #3
7
7
13
Data 5
out
Step signal to Gecko #3
8
8
15
Data 6
out
Dir signal to Gecko #4
9
9
17
Data 7
out
Step signal to Gecko #4
Buffered signals from the
PC.
10
10
19
~Ack
in
E-Stop, Fault and
Motor Disable
See sections 3.5.2 and
3.5.1
11
11
21
Busy
in
Contact Closure “pin
11”
12
12
23
Paper End
in
Contact Closure “pin
12”
13
13
25
Select Out
(note 4)
in
Contact Closure “pin
13”
Isolated and buffered
signals into PC, with
internal pull-up resistors
allowing them to directly
sense switch closures to
ground (pin 6 of J8).
14
14
2
~Auto Feed
out
Output “pin 14” and
relay K2 control
Isolated and buffered
output
15
32
4
~Error
in
Contact Closure “pin
15”
See contact closure note
above
16
31
6
~Init
out
Output “pin 16”
Isolated and buffered
output
17
36
8
~Select In
(note 4)
out
Output “pin 17” and
charge pump signal
Isolated and buffered
output, see section 3.6 for
charge pump description.
18 – 25 19-30,
33
10-24
(even)
Ground
Ground
Table 7- PC Parallel Port Connectors (J6 and J7)
NOTE 1 –
The PC Pin number column lists the pin numbers as they would appear on the PC’s
25-pin “D” connector when using a standard printer cable.
NOTE 2 –
J6 is the Centronics 36-pin connector on the PMDX-132. Only the Centronics pins
listed in the table above are connected to the PMDX-132. All other pins on the
Centronics connector are not connected to the PMDX-132.
NOTE 3 –
J7 is the 26-pin ribbon cable header on the PMDX-132.
NOTE 4 –
The “
~Select In
” and “
Select Out
” signals are named relative to the printer’s point of
view. That is why the “
~Select In
” is an
output
from the PC, and “
Select Out
” in an
input
.
