Parallel Interface - Compuprint 914 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 I/F 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
A78401745-001
Source Description
HOST
Clock signal which
contro ls
transmission.
HOST R e p r e s e n t s
tr an sm itted 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
s ign al
indicates that the
printer cannot accept
data.
data
"1" is
has been
which