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Section 3: Interface Specifications
M84Pro Service Manual PN: 9001113A Page 3-3
IEEE1284 PARALLEL INTERFACE
The parallel interface for the M-84PRO printers is a Plug-In Interface Module that can be installed
by the user. It conforms to the IEEE1284 specification. It will automatically detect the IEEE1284
signals and operate in the high speed mode. If it does not detect the IEEE1284 signals, it will
operate in the standard Centronics mode, which is significantly slower. For this reason, an
interface cable and host interface conforming to the IEEE1284 specification must be present to
fully utilize the speed capabilities. This interface also operates bi-directionally and can report the
status of the printer back to the host.
SPECIFICATIONS
Printer Connector AMP 57-40360 DDK (or equivalent)
Cable Connector AMP 57-30360 DDK (or equivalent)
Cable IEEE1284 Parallel, 10 ft. (3 m) or less
Signal Level High = +2.4V to +5.0V, Low = 0V to -0.4V
Data Stream <ESC>A . . Job#1 . . <ESC>Z<ESC>A . . Job#n . . <ESC>Z
NOTE: Pin assignments begin with one (1) in the upper right corner and
descend to eighteen (18) in the upper left corner. Pin number nineteen (19)
picks up in the lower right corner and descends to thirty-six (36) in the lower
left.
IEEE 1284 PARALLEL INTERFACE PIN ASSIGNMENTS
PIN SIGNAL DIRECTION PIN SIGNAL DIRECTION
1 Strobe To Printer 19 Strobe Return Reference
2 Data 1 To Printer 20 Data 1 Return Reference
3 Data 2 To Printer 21 Data 2 Return Reference
4 Data 3 To Printer 22 Data 3 Return Reference
5 Data 4 To Printer 23 Data 4 Return Reference
6 Data 5 To Printer 24 Data 5 Return Reference
7 Data 6 To Printer 25 Data 6 Return Reference
8 Data 7 To Printer 26 Data 7 Return Reference
9 Data 8 To Printer 27 Data 8 Return Reference
10 ACK To Host 28 ACK Return Reference
11 Busy To Host 29 Busy Return Reference
12 Ptr Error To Host 30 PE Return Reference
13 Select To Host 31 INIT From Host
14 AutoFD1 To Host 32 Fault To Host
15 Not Used 33 Not Used
16 Logic Gnd 34 Not Used
17 FG Frame Gnd 35 Not Used
18 +5V (z=24k ohm) To Host 36 SelectIn1 From Host
1 Signals required for ieee 1284 mode.