Specifications

REV.-A
1.3 INTERFACE OVERVIEW
The printer has a parallel interface with the
1.3.1 Parallel Interface
specifications described below.
Specifications for the 8-bit parallel interface are as follows:
Data format
8-bit parallel
Synchronization
STROBE signal
Handshaking BUSY and
ACKNLG signal
Signal level
ITL-compatible
Adaptable connector 57-30360 (Amphenol) or equivalent
Data transmission timing See Figure 1-9.
It
BUSY
4
, /
[ //
ACKNLG
DATA
STROBE
o.5#s o.5/.ls o.5/ls
511s
5ps
min.
min.
min.
WP
typ.
‘
Figure 1-9. Data Transmission Timing
Table 1-11 shows the connector pin assignments and signal functions of the 8-bit parallel interface.
Table 1-11. Connector Pin Assignments and Signal Functions
Pin
Signal Name
Return Dir.
Functional Description
No. Pin No.
1
STROBE
19
IN
STROBE pulse to read the input data. Pulse width must
be more than 0.5Ks. Input data is latched at falling
edge of this signal.
2
DATA 1
20 IN Parallel input data to the printer.
3
DATA 2 21
IN HIGH level means “ 1“.
4
DATA 3 22 IN LOW level means “O”.
5
DATA 4 23
IN
6
DATA 5 24
IN
7
DATA 6 25
IN
8
DATA 7 26
IN
9
DATA 8 27
IN
10 ACKNLG
28 OUT
This pulse indicates data has been received and the
printer is ready to accept more data. Pulse width is
approximately
1 Ips.
11
BUSY 29
OUT
HIGH indicates the printer cannot accept more data.
12
PE 30
OUT
HIGH indicates paper out. This signal is effective only
when the ERROR signal is LOW,
13
SLCT OUT
Always HIGH output (Pulled up to +5V through a 3.3K
ohm resistor.)
0
,-.’ ,
.
.
1
1-14