Parallel Interface - Compuprint 914N User Manual

Appendix C

Parallel Interface

The parallel interface is an 8-bits per byte TTL-compatible interface. It uses
7- or 8-bit data transfer code without parity check. You can select the parallel
interface via the Printer Setup procedure (see INTERFACE function in Chapter
3).
Drive Capability
Up to 15 feet (5 m) on AWG26 min. wire size of twisted conductors on
TTL receiver.
Printer Connector Type
AMPHENOL 57-40360-12-D56 or equivalent
Cable Connector
AMPHENOL 57-30360-12 or equivalent Interface
Signals
The interface pin assignment is described in the following table:
Signal Name
STROBE
DATA BIT 1
DATA BIT 2
DATA BIT 3
DATABIT 4
DATA BIT 5
DATA BIT 6
DATA BIT 7
DATA BIT 8
ACK
BUSY
C.2
Pin Number
S i g n a l Return
Wire Wire
1 19
2 20
3 21
4 22
5 23
6 24
7 25
8 26
9 27
10 28
11 29
A78401740-001
Source Description
HOST Clock signal which
c on tro ls
transmission.
HOST R e p r e s e n t s
tr an smitted data;
logical
represented by HIGH
level signal. DATA
BIT 1 (pin 2) is the
least significant bit.
PRT
Active LOW level
signal. Indicates that
d ata
received and stored in
the buffer.
PRT
An active HIGH level
sig nal
indicates that the
printer cannot accept
data.
d ata
"1" is
has been
which