Specifications
REV.-A
1.3 INTERFACE OVERVIEW
The printer has a parallel interface with the specifications described below.
1.3.1 Parallel Interface
Specifications for the 8-bit parallel interface are as follows:
Data format
Synchronization
Handshaking
Signal level
Adaptable connector
Data transmission timing
BUSY
ACKNLG
DATA
STROBE
8-bit
parallel
STROBE signal
BUSY and ACKNLG signal
TTL-compatible
57-30360 (Amphenol) or equivalent
See Figure l-6.
0.5/ls
0.5ps
0.59s
5p
5fls
<
3
4
min.
min.
min.
VP.
WP.
Figure 1-6. Data Transmission Timing
Table l-1 1 shows the connector pin assignments and signal functions of the 8-bit parallel interface.
Table l-l 1. Connector Pin Assignments and Signal Functions
Pin
No.
Signal Name
Return
Pin
No.
Dir.
Functional Description
1
STROBE
19
IN
STROBE pulse to read the input data. Pulse
VI
be more than
0.5~s.
Input data is latched
edge of this signal.
2
DATA 1
20
IN
Parallel input data to the printer.
3
DATA 2
21 IN
HIGH level means data 1.
4
DATA 3
22
IN
LOW level means data 0.
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 receive
printer is ready to accept more data.
Pulse
approximately 1
1~s.
11
BUSY
29
OUT
HIGH indicates the printer cannot accept n
12
PE
30
OUT
HIGH indicates paper out. This signal is effe
when the ERROR signal is LOW.
13 SLCT
-
OUT
Always HIGH output. (Pulled up to
+
5V
throt
ohm resistor.)
1-14